1. Which chamber (state the number) is the left ventricle ?

6

2. Which chamber is the right auricle (= atrium) ?

2

3. Name label number [4].

Septum

4. If a hole exists on [4], how would the function of the heart be affected ? What is the name of the pathological state ?

The efficiency of pumping blood around the body would decrease. The oxygenated blood of the left ventricle mixes with the deoxygenated blood of the right ventricle, hence the oxygen saturation of aortic blood is less than normal.

5. Identify the bicuspid valve and tricuspid valve.

Bi    and  Tri