Heart: Left Artium

Question 1

What is the ear like projection on the external surface of the left atrium?

Answer 1

Left Auricle

Question 2

What feature of the left atrium is also found in the right atrium, but is smooth instead of prominent?

Answer 2

Pectinate Muscle

Question 3

What are the openings of the left atrium?

Answer 3

1) Pulmonary Veins

2) Left Ventricle (via the mitral valve)

Question 4

How many pulmonary veins typically open into the left atrium?

Answer 4

Four (4)