17. Left Atrium and Ventricle: Section with Mitral Valve Cut Away

Question 1

Identify 1 -> 3

Answer 1

1. Left auricle
2. Aortic valve (Left, Right, and Posterior semilunar cusps)
3. Muscular part of interventricular septum

Question 2

Identify 4 -> 6

Answer 2

4. Left atrium
5. Valve of foramen ovale
6. Left pulmonary artery

Question 3

Usually, the left atrium is (1)___ (larger/smaller) than the right atrium, but it has (2)____ (thicker/thinner) walls.

→ Oxygenated blood from the lungs passes into the left atrium through 4 (3)___ (number can vary).

Answer 3

1. smaller
2. thicker
3. pulmonary veins

Question 4

The major blood supply to the interventricular septum is via the ____.

Answer 4

left anterior descending branch of the left coronary artery