Lecture 14 Heart

Question 1

The heart is a …

Answer 1

…muscular double pump.

Question 2

Where does the atria receive blood from?

Answer 2

The pulmonary and systemic circuits

Question 3

What are the pumping chambers of the heart?

Answer 3

The ventricles

Question 4

Answer 4

Question 5

What is the largest organ of the mediastinum?

Answer 5

The heart

Question 6

Where does the heart apex lie?

Answer 6

To the left of midline

Question 7

Where is the base located on the heart?

Answer 7

It is the broad posterior surface

Question 8

Answer 8

Question 9

Name the three layers of the heart wall,

from outer to inner

Answer 9

Epicardium (visceral layer of pericardium)

Myocardium (muscle)

Endocardium (lines internal walls)

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Which side of the heart has thicker muscle and why?

Answer 13

The left side as it must pump the systemic circuit

Question 14

What does CABG mean and why is it done?

Answer 14

Coronary Artery Bypass Graft

Done when vein is occluded

Question 15

What is ischemia?

Answer 15

A restriction in blood supply to tissues, causing a shortage of oxygen and glucose

Question 16

Which side get oxengated blood and through what blood vessle?

Answer 16

The left through the pulmonary veins

Question 17

Which heart valves open in and open out?

Answer 17

Open in: Tricuspid and Mitral valves

Open out: Aorta and Pulmonary valves

Question 18

Answer 18

Question 19

Answer 19

Question 20

What are the names of the three blood vessles off the aortic arch?

Answer 20

Brachiocephalic trunk

Common carotid artery

Subclavian artery