Chambers

Question 1

What are the four chambers of the heart?

Answer 1

1) right atrium
2) right ventricle
3) left atrium
4) left ventricle

Question 2

F: right atrium

Answer 2

F: receives venous blood from superior vena cava, inferior vena cava, and coronary sinus

Question 3

Where are the pectinate muscles in the right atrium?

Answer 3

Lines the anterior part of the right atrium and extends into right auricle

Question 4

Fossa ovalis

Answer 4

Remnant of the foramen ovalis that connected the right and left atrium

Question 5

How does the right atrium connect to the right ventricle?

Answer 5

Right atrioventricular opening, guarded by the tricuspid valve

Question 6

F: right ventricle

Answer 6

F: receives blood from the right atrium

Question 7

Trabeculae carneae

Answer 7

i. Muscular ridges in the right ventricle and left ventricle

Question 8

How many papillary muscles are there in the right ventricle?

Answer 8

3

Question 9

F: papillary muscles

Answer 9

muscles that arise from the walls of the right ventricle/left ventricle and insert to the tricuspid valve to prevent blood from flowing backwards

Question 10

How do the papillary muscles connect to the tricuspid/bicuspid valve?

Answer 10

Chordae tendineae (tendon-like structures)

Question 11

Pulmonary valve

Answer 11

i. Prevents blood from flowing back to the right ventricle

Question 12

What separates the right and left ventricle?

Answer 12

Interventricular septum

Question 13

Where does the pulmonary artery arise?

Answer 13

Superior part of the right ventricle

Question 14

F: left atrium

Answer 14

F: receives oxygenated venous blood from the right and left pulmonary veins

Question 15

Where are the pectinate muscles in the left atrium?

Answer 15

Only found in the left auricle

Question 16

How does the left atrium connect to the left ventricle?

Answer 16

Left atrioventricular opening, guarded by the bicuspid valve

Question 17

F: left ventricle

Answer 17

F: receives blood from the left atrium and pumps to rest of the body

Question 18

Where does the aorta arise from?

Answer 18

Superior part of the left ventricle

Question 19

Aortic valve

Answer 19

Prevents blood from flowing back to the left ventricle

Question 20

Where are the pectinate muscles in the heart?

Answer 20

a. Right atrium: anterior part and extends into right auricle
b. Left atrium: left auricle

Question 21

What is the purpose of the papillary muscles?

Answer 21

a. Prevents semilunar valves from opening (by harnessing it so it does not flip and open

Question 22

Why is the right ventricle so much thinner than the left ventricle?

Answer 22

i. Left ventricle needs to pump blood to rest of body (needs to be stronger)
ii. Too thick right ventricle can cause damage to the lungs if the pressure too high
iii. Right ventricle was not really used (for pumping blood) during development so not as thick compared to the left ventricle which was used on day one