Structure & Function of the Heart

Question 1

The heart is made up of a special muscle called?

Answer 1

Cardiac muscle

Question 2

The heart is divided into four chambers, name the upper and lower chambers.

Answer 2

Upper chambers - Right atrium, Left atrium
Lower chambers - Right ventricle, Left ventricle

Question 3

The heart is divided into left and right sides by the ___.

Answer 3

Septum

Question 4

True or False:
The ventricle walls are thicker than the atria walls.

Answer 4

True

Question 5

The left ventricle wall is the thickest wall. Why?

Answer 5

Because the left ventricle has to pump blood to the Aorta under high pressure

Question 6

There are valves between the Atria and Ventricles. State the functions of valves. (2)

Answer 6

1. To prevent back-flow of the blood (from ventricles to atria)
2. To maintain pressure within the heart

Question 7

The valve between the right ventricle and atrium is ___ and the valve between the left atrium and ventricle is ___.

Answer 7

Tricuspid and Bicuspid (also known as Mitral valve)