Anatomy of the Blood Vessels and Special Circulations Flashcards
Barbara Herlihy. (2020). The Human Body in Health and Illness (7th Edition) [Texidium version]. Retrieved from http://texidium.com
What are the series of connected hollow tubes that begin and end in the heart?
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Blood Vessels
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What forms a path through the body, much like the highway and road system that enables us to travel from place to place?
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Blood Vessels
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What do the heart and blood vessels form?
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Circuit
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What arrangement ensures a continuous one-way blood movement?
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Circuit
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Which circulation carries blood from the heart’s right ventricle to the lungs and back to the heart’s left atrium?
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Pulmonary
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Which circulation transports unoxygenated blood to the lungs, where oxygen is loaded and carbon dioxide is unloaded?
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Pulmonary
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In which circulation is oxygenated blood pumped after returning to the heart’s left side?
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Systemic
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Which circulation
Is larger?
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Systemic
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Which circulation provides blood supply to the rest of the body?
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Systemic
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Which circulation carries oxygen and other nutrients to the cells and picks up carbon dioxide and other waste?
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Systemic
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What are the body’s highways?
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Blood Vessels
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What are the three anatomical blood vessel classes?
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Arteries
Capillaries
Veins
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What are blood vessels that carry blood away from the heart?
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Arteries
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The large arteries repeatedly branch into smaller and smaller arteries as they are distributed throughout the entire body.
As they branch, the arteries become much more numerous but smaller in diameter.
The smallest arteries are called ___.
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arterioles
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Most of the arteries are coloured ___ because they carry ___ blood.
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red
oxygenated
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Blood flows from the arterioles into the ___.
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capillaries
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What are the smallest and most numerous blood vessels?
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Capillaries
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What connect the arterioles with the venules?
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Capillaries
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What are close to cells because the body has so many of them?
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Capillaries
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Which blood vessel arrangement provides every cell with a continuous supply of oxygen and other nutrients?
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Capillaries
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Which blood vessels are coloured from red to purple to blue?
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Capillaries
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At the ___ level, the blood gives up its oxygen to the tissues; the unoxygenated blood leaving the tissues is therefore bluish.
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capillary
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Blood flows from the capillaries into the ___.
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venules
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Which blood vessels carry blood back to the heart?
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Veins
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What are the smallest veins?
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Venules
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The small venules converge to form fewer but larger ___.
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veins
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The largest ___ empty blood into the heart’s right atrium.
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veins
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Most ___ are coloured blue because they carry unoxygenated blood.
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veins
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A Circuit or Route: The Circulatory System
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Except for ___, blood vessels are composed of three tissue layers (or tunics): tunica ___, tunica ___, and tunica ___.
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capillaries
intima
media
adventitia
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Which is the innermost tunica, an endothelium?
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Intima
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Which tunica’s endothelial lining forms a slick, shiny surface continuous with the endocardium, the heart’s inner lining?
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Intima
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Which tuinca’s surface does blood flow easily and smoothly along?
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Intima
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Which is the middle tunica?
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Media
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Which is the thickest tunica and is composed primarily of elastic tissue and smooth muscle?
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Media
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Tunica media thickness and composition vary according to blood vessel function.
The large ___, for example, contain considerable elastic tissue so that they can stretch in response to blood pumping by the heart.
The smallest of the ___, the ___, are composed primarily of smooth muscle.
The muscle allows the ___ to contract and relax, thereby changing the ___ diameter.
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arteries x 2
arterioles x 2
arteriole
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Which is outer tunica?
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Adventitia
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Which tunica is composed of tough connective tissue?
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Adventitia
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Which tunica’s main function is to support and protect blood vessels?
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Adventitia
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Blood Vessel Wall Layers
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Which blood vessel walls are large, thick, tough, and elastic because they must withstand the high blood pressure pumped from the ventricles?
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Arteries
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Large arteries are called ___ vessels with a primary function to conduct blood from the heart to the arterioles.
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conductance
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What are the smallest arteries?
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Arterioles
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What are composed primarily of smooth muscle and spend most time contracting and relaxing?
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Arterioles
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By changing diameter, the ___ affect resistance to blood flow.
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arterioles
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A narrow (constricted) vessel offers an (decreased/increased) resistance to blood flow; a wider (dilated) vessel offers (less/more) resistance.
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increased
less
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The arterioles are called ___ vessels because of their effect on ___.
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resistance x 2
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Which blood vessels have the thinnest walls?
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Capillaries
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The capillary wall is made up of a single ___ layer lying on a delicate ___ membrane.
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endothelium
basement
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The thin ___ ___ enables water and dissolved substances, including oxygen, to move across from blood into tissue spaces, where they become available for cell use.
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capillary wall
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What allows waste from the metabolizing cell to diffuse from the tissue spaces into the capillaries for blood transport to excretion organs?
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Capillary Wall
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The capillaries are called ___ vessels because they allow for an ___ of nutrients and waste.
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exchange x 2
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Which walls are slightly thicker than the capillary walls?
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Venules
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As the venules converge to form larger ___, the walls become even thicker.
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veins
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A vein’s tunica ___ is much thinner than an artery’s tunica ___.
This difference is appropriate because vein pressure is much less than arterial pressure.
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media x 2
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Which blood vessels mostly contain one-way valves?
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Veins
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Which blood vessel’s valves direct blood flow toward the heart?
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Veins
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What are most numerous in lower extremitiy veins, where they prevent backflow, helping move blood up and away from the ankles toward the heart?
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Valves
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While the ___ facilitate venous blood movement toward the heart, the veins sometimes need some “outside” help.
This is particularly true of the veins of the ___ extremities.
Although blood pressure is very high in arterial circulation, it decreases to almost ___ mm Hg in the veins.
The pressure in the veins is so low, in fact, that it alone cannot return blood from the veins back to the heart.
The “outside” help is the ___ ___ ___.
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valves
lower
0
skeletal muscle pump
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The large veins in the leg are surrounded by ___ ___.
When the ___ ___ are relaxed and blood flow slows, the valves close.
As the ___ ___ contract, they squeeze the large veins, thereby opening the valves and forcing blood toward the heart.
This mechanism is called the ___ ___ ___.
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skeletal muscles x 3
skeletal muscle pump
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What improves the heart’s venous blood return and prevents blood stagnation and thrombosis (blood clot formation)?
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Exercise
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Which vessels store blood?
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Veins
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What total blood volume percentage is found on the venous circulation side?
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70%
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Veins are called ___ vessels because they store blood.
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Capacitance
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When stored blood is needed, the veins constrict (___) and move blood to the heart for circulation.
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venoconstriction
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Skeletal Muscle Pump
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The portal blood delivery to the ___ is important because the ___ plays a critical role in glucose, fats, and protein metabolism.
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liver x 2
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Where are many nutrients exracted from blood and modified?
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Liver
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What has immediate access to large glucose amounts absorbed into the blood following digestion?
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Liver
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What uses glucose to regulate blood sugar?
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Liver
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What removes excess glucose and stores it as glycogen or releases glucose into the blood to maintain a normal blood sugar?
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Liver
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What prevents nitrogen from entering the general circulation as ammonia?
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Liver
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What is excreted by the liver into the blood in the form of urea?
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Nitrogen
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What is less toxic than ammonia and is easily eliminated by the kidneys?
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Urea
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The three blood vessels associated with hepatic circulation are the hepatic ___, the hepatic ___, and the hepatic ___ ___.
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artery
veins
portal system
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The hepatic ___ is a celiac trunk branch, a large ___ that branches off the abdominal aorta.
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artery x 2
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What carries oxygen-rich blood to the liver?
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Hepatic Artery
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What drains blood from the liver and delivers it to the inferior vena cava?
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Hepatic Veins
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The hepatic portal system is a unique vein arrangement that delivers ___% of the blood flow to the liver.
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80
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What arrangement delivers venous blood to the liver?
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Hepatic Portal System
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Which system refers to a blood vessel arrangement in which the blood from one organ(s) is immediately delivered to a second organ(s) before being returned to the heart and lungs for oxygenation?
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Portal
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Which system delivers blood, rich in digestive end products, from all the different digestive organs to the liver?
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Hepatic Portal
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Which large vein carries blood from the digestive organs to the liver?
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Portal
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What is formed by the union of two large veins: the superior mesenteric vein and the splenic vein?
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Portal Vein
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Which vein receives blood from the small intestine (where most digestion and absorption occur) and the first part of the large intestine?
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Superior Mesenteric
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Which vein receives blood from the stomach, spleen, and pancreas?
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Splenic
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Which vein receives blood from the inferior mesenteric vein, which drains the large intestine’s distal part?
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Splenic
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Which vein delivers blood rich in digestive end products directly to the liver?
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Portal
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What carries oxygen-rich blood to the liver?
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Hepatic Artery
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What carries blood rich in digestion products to the liver but poor in oxygen content?
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Portal Vein
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Once in the liver, blood from both the hepatic artery and portal vein perfuses the capillaries called hepatic ___.
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sinusoids
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What have large pores that permit the mixing of arterial and venous blood and facilitate the delivery of digestive end-products to the liver cells?
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Sinusoids
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What are lined with phagocytic Kupffer cells?
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Sinusoids
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Which cells remove bacteria from portal blood before blood enters general circulation?
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Kupffer
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Hepatic Portal Circulation
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The ventricles pump blood into the arteries about ___ times/min.
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72
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What is the alternating expansion and recoil pressure wave (similar to vibration) that travels through all the arteries?
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Pulse
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What is often described as a “heartbeat that can be felt at the wrist” because it is caused by the rhythmic contraction of the heart’s ventricles?
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Pulse
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Which artery is most often used to feel a pulse although it can be felt in any artery lying close to the body’s surface?
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Radial
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What can be determined by feeling a pulse?
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Heart Rate (HR)
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A normal heart rate is about ___ beats/min.
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72
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What can determine if the heart is beating regularly (rhythmically) or irregularly?
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Pulse
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At times, the heart contracts so weakly that the heartbeat cannot be felt over the ___ artery; this happens in a person who has lost a lot of blood and is in shock.
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radial
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EDIT
What may be described as being “rapid and thready” or “full or bounding,” as happens in a person with excess blood volume?
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Pulse
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What may be absent if the artery is blocked or occluded?
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Pulse
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Which pulse may be undetectable in a person with poor arterial foot circulation, as occurs with many diabetic persons?
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Dorsalis Pedis
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A pulse ___ is a difference between the heart rate (HR) as determined by auscultation at the apex of the heart and the heart rate (HR) as determined by radial artery palpation.
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deficit
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In certain clinical conditions, such as atrial fibrillation, the heart beats, but it does so ineffectively.
Consequently, the vibration set up in the arterial wall is too weak to be felt at the wrist (___ pulse).
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radial
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The underlying cause of a pulse deficit is easily detected with an ___ (___).
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electrocardiogram (ECG)
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Q