Unit 5 Part 1 Flashcards
network of highways connecting muscles and organs through an extensive system of vessels that transport blood, nutrients, and waste.
Cardiovascular System
Different Types of Molecules Move Through The Cardiovascular System
Nutrients
Oxygen
Metabolic wastes
Hormones
heat
from digested food to cells
Nutrients
from lungs to cells
Oxygen
from cells to excretory organs.
Metabolic wastes
regulate body activities
Hormones
maintain body temperature (constrict or dilate)
heat
Three interrelated components of the Cardiovascular System
- Blood (transport vehicle)
- Heart (pump)
- Blood vessels (network of tubes)
Other Components of the Hemovascular System
Bone marrow
* Liver
* Spleen
* Lymph system
Other Components of the Hemovascular System
-Bone marrow -red and yellow
-Liver
-Spleen
-Lymph system
– Acts as a filter
– Produces all the PROCOAGULANTS essential to
hemostasis and blood coagulation
(PROTHROMBIN and CLOTTING FACTORS)
– formation of Vitamin K
– Stores excess iron
– Produces HEPDICIN , a key regulator of iron balance
Liver
procoagulants
(PROTHROMBIN and CLOTTING FACTORS)\
Hematopoietic
Filtration
Immunologic
Storage
Spleen
Able to produce RBCs during fetal development
Hematopoietic
Remove old and damaged RBCs from circulation
Removes hemoglobin from RBCs and returns iron
component to the bone marrow for reuse
Filters out bacteria, especially encapsulated
organisms
Filtration
Contains a rich supply of lymphocytes,
monocytes, and stored immunoglobulins
Immunologic:
Stores RBCs and approximately 30% of total
mass of platelets
Storage:
transports substances between body cells and the
external environment
blood
liquid connective tissue
blood
mixture of formed elements and plasma
blood
living blood cells & platelets
formed elements
the fluid matrix
plasma
Physical characteristics of blood
* ___ than water
* Temperature about ___ higher than oral or rectal body temperature
* Alkaline pH ??
* ___ of total body weight
* L in adult male
* L in adult female
More viscous
1 degree celsius
7.35 to 7.45
~8%
5-6
4-5
Functions of Blood
➢Transport and Distribution
➢Regulation of Internal Homeostasis
➢Protection
➢Transport and Distribution
delivery: ?
removal: ?
O2, nutrients, and hormones
CO2 and metabolic wastes
➢Regulation of Internal Homeostasis
– body temperature
– pH
– fluid volume
– composition of the interstitial fluid/lymph
➢Protection
– necessary for inflammation and repair
– prevents blood loss by hemostasis (coagulation)
– prevents infection
2 parts of blood sample
Plasma
Formed elements
– ~55% of the volume
– straw colored liquid on top
Plasma
~45% of the volume
– red blood cells (99%)
– buffy coat - white blood cells and platelets (1%)
Formed elements
white blood cells and platelets (1%)
buffy coat
➢ 92% WATER
➢ 7% PROTEINS
➢Important for osmotic balance
➢ 1.5% OTHER SOLUTES
PLASMA
(60%)
–transports lipids
–steroid hormones
Albumin
(4%) - blood clotting
Fibrinogen
(35%) – many different proteins with a wide variety of functions
–globulin classes α, β, and γ
* 1% other regulatory proteins
Globulins
carried to various organs for removal
Waste products
glucose and other sugars, amino acids, lipids, vitamins and minerals
Nutrients
- enzymes
- hormones
Regulatory substances
O2
, CO2
, N2
Gases
Electrolytes
(ions)
➢ >99% RED BLOODCELLS
➢ <1% WHITE BLOOD CELLS and THROMBOCYTES (platelets)
FORMED ELEMENTS
➢LIVING CELLS
➢Erythrocytes, or Red Blood Cells (RBC’s), for O2 and
CO2 transport
➢RBCs’ hemoglobin also helps buffer the blood
rbc
– neutrophils
– eosinophils
– basophils
- Granular leukocytes (granulocytes)
– lymphocytes - T cells, B cells
–monocytes → tissue macrophages
Agranular leukocytes (agranulocytes)
pump of blood in an hour
300 quarts
heartbeat
a day
per year
lifetime
100,000 times
35 million
2,700,000,000
largest artery in the body
diameter of a garden hose
aorta
small that it takes ten of them to
equal the thickness of a human hair
Capillaries
body has about __liters (__ quarts) of blood.
5.6
6
circulation of blood
minute
day
3 times every minute
total of 19,000 km (12,000 miles)
___ have bigger anatomical hearts
males
location of heart
mediastinum
broad superior portion of heart
Base
inferior end, tilts to the left, tapers to point
Apex
– Carry blood from the right ventricle to the lungs
– Blood is deoxygenated
Pulmonary Arteries
– Carry blood from the lungs to the left atrium
– Blood is oxygenated
Pulmonary Veins
– Carries blood from the body to the right atrium
– Blood is deoxygenated
Superior & Inferior Vena Cava
– Carries blood from the left ventricle to the body
– Blood is oxygenated
Aorta
like a cone on its side between the lungs
heart
- surrounds heart, keeps your heart in it’s place (like a father-in-law with the gun collection)
- Allows heart to beat without friction, room to expand and resists excessive expansion
Pericardium
Superficial, tough, elastic
Fibrous Pericardium
Thinner, delicate, double layer
Serous Pericardium
– fused to the fibrous pericardium
Parietal Layer
Parietal Layer
Parietal Layer
outside slippery layer
Epicardium-/visceral pericardium
muscle of heart
myocardium
inside the heart
Endocardium
- Atrial walls are thinnest
- Right ventricle thinner than left ventricle
– pumps blood shorter distance - Left ventricle walls thickest
- Right and left ventricles pump same volume of
blood with each beat
Myocardium
- Interatrial septum
- Pectinate muscles
- Interventricular septum
- Trabeculae carneae
- Chordae tendineae
- Heart Valves
Endocardium
– wall that separates atria
Interatrial septum
– internal ridges of myocardium in right atrium and
both auricles
- Pectinate muscles
– wall that separates ventricles
Interventricular septum
– internal ridges in both ventricles walls
Trabeculae carneae
cords connecting to the tricuspid and mitral valves
Chordae tendineae
inflammation of the pericardium
Pericarditis
-chest pain
-pericardial friction rub (creaking sound)
Acute Pericarditis
-pericardial fluid accumulates—compress heart
-Cardiac tamponade -fluid in the pericardial cavity
compressing the heart, can stop the heart beat
-cancer and tuberculosis
chronic pericarditis
inflammation of the myocardium
myocarditis
– viral infection, rheumatic fever,
exposure to radiation or certain chemicals,
medications
-fever, fatigue, chest pain, irregular or rapid
heart beat, joint pain, breathlessness
Myocarditis
inflammation of the endocardium
Endocarditis
entry halls
atria
little bellies
ventricles
– 2 superior, posterior chambers
– receive blood returning to heart
Right and left atria
– 2 inferior chambers
– pump blood into arteries
Right and left ventricles
resting pulse rate
kid
adult
90-120
slows to an ave. of 72
- Vessels that carry blood to and from the lungs
- Pulmonary circuit is a short, low-pressure circulation
Right side is the pump for the pulmonary circuit
- Vessels that carry the blood to and from all body tissues
- Systemic circuit blood encounters much resistance in
the long pathways - Anatomy of the ventricles reflects these differences
– Left side is the pump for the systemic circuit
blood flow in the heart
Right atrium → tricuspid valve → right ventricle → pulmonary semilunar valve → pulmonary trunk → pulmonary arteries →
lungs → pulmonary veins → left atrium → bicuspid valve → left ventricle → aortic semilunar valve → aorta→ systemic circulation
- Ensure one-way blood flow
- Semilunar valves
- Atrioventricular (AV) valves
Heart Valves
- control flow into great arteries
Semilunar valves
from right ventricle into pulmonary trunk
Semilunar valves pulmonary:
from left ventricle into aorta
Semilunar valves aortic
right AV valve has
3 cusps (tricuspid valve)
left AV valve has
2 cusps (mitral, bicuspid valve)
- cords connect AV valves to papillary muscles (on floor of ventricles)
chordae tendineae
The valves of the heart open and close in
response to
pressure changes as the heart contracts and relaxes