Term
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Definition
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Term
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Definition
function: supplies oxygen and nutrients to tissues, removes waste.
includes: capillaries, veins, heart, vessels, and arteries |
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Term
| What are the 3 layers of the walls of the heart? |
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Definition
1. the epicardium - outermost layer
2. myocardium - middle layer
3. endocardium - innermost layer |
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Term
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Definition
outermost layer of the heart.
made of connective tissue.
functions to house blood.
aka visceral pericardium |
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Term
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Definition
middle layer (and thickest layer) of the heart wall
made of cardiac muscle |
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Term
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Definition
Innermost layer of the heart wall
made of connective tissue
is "continuous" with the endothelium of the major vessels joining the heart. |
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Term
| How many chambers does the heart have? |
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Definition
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Term
Where are the atria located?
what is their function? |
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Definition
On top (The top two heart chambers)
Atria recieve blood returning to the heart
have thin walls |
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Term
Where are the ventricles located?
what is their function |
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Definition
The bottom (the ventricles are the bottom two chambers of the heart)
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Term
| What divides the atrium and ventricles? |
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Definition
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Term
| what does an A-V valve do? |
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Definition
ensures that the blood flows only one way
the RIGHT A-V valve is a tricuspid
the LEFT A-V valve is a BIcuspid
corrdae tendinae contract to prevent backflow of blood through the A-V valves |
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Term
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Definition
attached to papillary muscles in the inner heart that contract during ventricular contraction to prevent backflow of blood through the A-V valves
when the chordae tendinae is relaxed, the valve is opened, when it is contracted, the valve is closed |
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Term
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Definition
| superior and inferior both bring blood from the body to the right atrium. |
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Term
| why does the right ventricle have a thinner wall than the left ventricle? |
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Definition
| because the right ventricle only has to pump blood to the lungs, compared to the left ventricle which has to pump blood to the entire body |
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Term
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Definition
found at the base of the pulmonary trunk
functions to prevent a return flow of blood to the ventricle |
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Term
| how many pulmonary veins are there? |
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Definition
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Term
| where does the left atrium recieve blood from? |
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Definition
| Recieves blood from the four pulmonary veins |
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