Blood Vessels Test Flashcards
What blood vessel layer in the innermost, smooth and thick had an endothelial lining and a lumen?
Tunica intima
What are the 3 major types of blood vessels?
Arteries, capillaries, and venules
Thin slick surface that lines the lumen
Endothelial lining
Inside opening of a blood vessel
Lumen
The only layer in all blood vessels
Tunica intima
The smooth muscle layer, the bulkiest, I’m arteries and veins, plays the greatest role in maintaining blood pressure
Tunica media
Outer most layer, rich in nerve endings and lymph vessels, supplied w/ blood by the vasal vasorum
Tunica aderentitia
Vessel of the vessels
Vasal vasorum
Carries blood away from the heart to tissues
Arteries
Close to the heart, thick and Withstand great pressure
Elastic arteries
Carry blood to specific organs and are mostly smooth muscles
Muscular arteries
Feed blood to capillary bed, have 0.5 mm or smaller lumen, can construct and dilate
Arterioles
The alternating expansion and recoil of arterial walls with each heartbeat
Pulse
Pulse rate reflects what?
Heart rate
Microscopic, only 1 layer, average length is 1 mm, RBC in single file through lumen, exchange nutrients with water and oxygen with carbon dioxide
Capillaries
Take blood back to the heart, capillaries drain into venules and into larger veins, all 3 tunic layers, have larger lumen, contain valves
Veins
What help return blood?
Valves, breathing, moving skeletal muscles
These form when valves don’t close all the way and blood pools in them
Varicose veins
Te force exerted on the wall of a blood vessel by its contained blood
Blood pressure
Normal blood pressure
120/80
Blood pressure is highest in the ______ and lowest in the ______.
Aorta; vena cava
The top #, the pressure in arteries when the heart is contracting
Systolic pressure
Bottom #, pressure in arteries when heart is relaxed
Diastolic pressure
How blood moved to the tissue to take oxygen to body cells
Pressure
What factors affect blood pressure?
Cardiac output, peripheral resistance, and blood volume
How much blood your heart can pump out in 1 min
Cardiac output
How hard/ elastic the lumen walls are n
Peripheral resistance
Average is 5 liters
Blood volume
Decrease in blood volume =
Increase in blood volume =
Decreased BP
Increased BP
How is blood pressure regulated?
Controlled by nerve impulses, nerves cause vessels to vasoconstrict/vasodilator, low blood oxygen caused vasoconstriction, drugs and body chemicals
Norepinephrine and epinephrine cause
The flight are fight response (increased BP)
Hormone causes kidneys to excrete more water from the blood stream into the bladder (BV AND BP DROP)
ANF
Causes kidneys to save water back into the blood stream (BV AND BP INCREASE)
ADH
Cause drop in BP by increasing vasodilation and inhibits ADH release
Alcohol
Vasoconstrictor, increased BP
Nicotine
Low BP, can be dangerous and cause anemia, blood loss, pressure may not be high enough to rid blood of wastes in kidneys
Hypotension
High BP, common in obese people, no symptoms, major cause of heart failure, renal failure, and stroke, can lead to atherosclerosis
Hypertension
Hardening of the arteries
Atherosclerosis
Lungs low pressure
Pulmonary
Right ventricle to
Pulmonary truck
Pulmonary trunk to right and left
Pulmonary arteries
Pulmonary arteries to the
Lobar arteries in the lungs
Lobar arteries in the lungs to
The arterioles
The arterioles to the
The capillaries where gas exchange occurs
The capillaries where gas exchange occurs to
The venules
The venules to
2 right and left pulmonary veins