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31 Cards in this Set

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internal system of transport, (reaches every part of body), transports oxygen IN and carbon dioxide OUT distributes nutrients to cells and transports wastes to disposal sites?
Circulatory System
blood pumped through open-ended vessels?
Open System
fluid that surrounds cells?
Interstitial Fluid
blood is confined to vessels, veins return blood to the heart?
Closed System
What are the 3 main types od blood vessels?
1. arteries
2. veins
3. capillaries
carry blood away from heart, not always oxygenated. (to lungs-blue+deoxygenated) (to body-red=oxygenated)
arteries
carry blood to the heart, (from lungs=red) (from body=blue)
veins
thin layer of endothelial cells. (this so everything can easily flow through it) (vessels in between veins and arteries)
capillaries
veins branch off into smaller _________ ?
venules
arteries branch off into smaller __________ ?
arterioles
what are the 3 layers of a capillary?
1. internal epithelium (inner)
2. smooth layer (middle)
3. connective tissue w/ elastic fibers (outer)
what flows into and out of a capillary?
nutrients and O2 go out into the cell and waster goes from the cell into the capillary.
what are the 3 main ways the exchange of substances occur @ the capillary beds?
1. simple diffusion (O2 & CO2)
2. Endocytosis(in the cell)
Exocytosis (out of ceel)
3. Capillary walls are leaky(molecules can move to go out capillary into interstical fluids. sugars & salts)
pushes fluid out of vessels?
blood pressure
pushes fluid into vessels?
osmotic pressure
heart contracts and relaxes?
cardiac cycle
heart is relaxed, blood can flow into the atrium & ventricle (right to left)
Diastole
a brief comtraction of the atrium, which fills the vertricles and the ventricles contract and blood goes out throught the arteries?
Systole
sets tempo for the heart?
pacemaker
right atrium electrical signal starts?
SA- sinoatrial node
atrial ventricular node, contracts
AV node
bottom of the heart, electrical starts
Apex
reading electrical signal of the heart?
elctrocardiogram
amt. of blood the left ventricle pumps, amt of pumps per minute, amt of blood pumped each time the left ventricle contracts?
cardiac output
force that blood exerts agains the walls of our blood vessels?
blood pressure
what are the 2 main componets of blood?
1. plasma
2. several types of cells
liquid part, 55%, contains H2O, salts, plasma proteins & substances transported by blood?
plasma
45%, contains, erythrocytes, leukocytes, and platelets?
several types of cells
transports oxygen, (contains hemoglobin?
RBC's Erythrocytes= red blood cells
5 main types, function is defence & immunity. fight infection?
WBC Leukocytes= white blood cells
fragements of cells, function = blood clotting. seals blood vessels when they get cut.
platelets