Blood Flow Through Heart & Coronary Circulation Flashcards Preview

Honors Anatomy & Physiology > Blood Flow Through Heart & Coronary Circulation > Flashcards

Flashcards in Blood Flow Through Heart & Coronary Circulation Deck (17):
1

Chamber Walls (3)

Atrial Walls
Left Ventricle Wall
Right Ventricle Wall

2

Atrial Walls
description? function?

thin-walled
collect and pump blood only a short distance

3

Left Ventricle Wall
description? function?

thickest
must pump blood through entire body

4

Right Ventricle Wall
description? function?

thicker than atria, thinner than left ventricle wall
only pumps blood to lungs

5

Pressure Gradients in the Heart
CV system is what kind of system? what does that mean/

"closed-circuit" system
-blood flows in a loop, doesn't leave the vessels

6

Pressure Gradients in the Heart
how does the pressure gradient come about? what happens when the atria contract? ventricles contract?

chamber contraction increases the pressure on fluid within, causes blood flow down its pressure gradient
-atria contract, high blood pressure within forces AV valves to open
-ventricles contract & pressure of blood increases which forces the SL valves to open

7

coronary circulation

myocardium's own network of blood vessels
--supply O2 & nutrients to heart muscle wall
-coronary arteries
-coronary veins

8

coronary arteries
description? function? location

O2 rich blood
-deliver blood to heart muscle when heart relaxes
-from aorta

9

coronary veins
description? function? location?

O2 poor blood
-receives blood from heart muscle
-drains into coronary sinus

10

different coronary arteries?

branches from ascending aorta
-left coronary artery
-right coronary artery

11

left coronary artery
aka? function?

-aka the 'widow maker' (most common one that causes heart attack)
-supplies O2 to anterior ventricle walls, left atrium

12

right coronary artery
function?

supples O2 to right atrium wall, right ventricle wall

13

coronary artery obstruction
what kind of obstruction is possible?

partial obstruction
total obstruction

14

partial coronary artery obstruction?
aka? involves?

mycardial ischemia
-aka Angina pectoris
-severe chest pain accompanies ischemia
(like heart attack, pain, heart burn)

15

total coronary artery obstruction?
aka? involves?

aka heart attack (caused by plaque build up in arteries)
INFARCTION- tissue death
-replaced by scar tissue

16

all veins drain where?

coronary sinus

17

blood flow through the heart

superior & inferior vena cava-> right atrium-> tricuspid valve -> right ventricle-> pulmonary valve-> pulmonary trunk-> pulmonary arteries-> lungs, O2-> pulmonary veins-> left atrium-> bicuspid (mitral) valve-> left ventricle-> aortic valve
-> aorta-> rest of body