Mass Transport 4 - The Mammalian Heart

Question 1

What is the function of the vena cava and where is it found?

Answer 1

Collects deoxygenated blood from your whole body and bring it back to your heart for new oxygen
Found on right side of the heart connected to right atrium

Question 2

What is the function of the right atrium and where is it found?

Answer 2

Receives blood from the veins that has already circulated through the body and pumps it over to the right ventricle.
On the right side

Question 3

What is the function of the tricuspid valve and where is it found?

Answer 3

Prevents blood backflow between right ventricle and right atrium when heart contracts
Between the right atrium and right ventricle

Question 4

What is the function of the right ventricle and where is it found?

Answer 4

Passes the blood on to the pulmonary artery, which sends it to the lungs to pick up oxygen.
On right side

Question 5

What is the function of the pulmonary artery and where is it found?

Answer 5

Carries oxygen-poor blood from heart to lung
Above the right ventricle

Question 6

What is the function of the semi-lunar valves and where are they found?

Answer 6

Close to prevent blood flowing back into the ventricles

Question 7

What is the function of the aorta and where is it found?

Answer 7

Main vessel through which oxygen-rich blood travels from heart to the rest of the body
Above the left ventricle

Question 8

What is the function of the left ventricle and where is it found?

Answer 8

Pumps the oxygen-rich blood to the body through a large network of arteries
On the left

Question 9

What is the function of the left atrium and where is it found?

Answer 9

Receives the now oxygen-rich blood from the lungs and pumps it into the left ventricle
On the left

Question 10

What is the function of the bicuspid valve and where is it found?

Answer 10

Prevent blood backflow between left ventricle and right atrium when heart contracts
Between left ventricle and left atrium

Question 11

What is the function of the pulmonary vein and where is it found?

Answer 11

Carries oxygen-rich blood from lungs to heart
Connected to left atrium

Question 12

What is the function of the septum and where is it found?

Answer 12

Internal wall that divides the sides of the heart to prevent deoxygenated blood and oxygenated blood mixing
Between left and right side of heart and at bottom of both ventricles

Question 13

What is the function of the apex and where is it found?

Answer 13

Contraction from apex and around ventricular walls
In middle of septum at base of the heart

Question 14

What is the function of the coronary artery and where is it found?

Answer 14

Provide the main blood supply to the heart and supply the myocardium with oxygen to allow for the contraction of the heart, causing circulation of the blood throughout the body
Found inside the heart muscle that branches off the aorta

Question 15

What is the function of the sino-atrial node (SAN) and where is it found?

Answer 15

Generates an electrical signal that causes the upper heart chambers (atria) to contract
Found in the right atrium

Question 16

Describe the heart conduction system

Answer 16

Sino-atrial node in right atrium produces a spontaneous impulse ~ depolarises and generates an electrical impulse
Impulses spread across atria and stimulate a wave of contractions = atrial systole
Contractions blocked by a non-conducting tissue between atria and ventricles
Passes through AV node (only spot that can conduct impulses)
After AV node, impulse travels to bundle of his then purkinje fibres
Once atria completely contracts, ventricles start to contract when the impulse reaches the ventricular walls