The heart

1- Myocardium of the heart is made up of special type of muscles:

• (a) smooth muscles

• (b) skeletal muscles

• (c) cardiac muscles

• (d) both a & c

2- Heart pumps the blood to different parts of the body via:

• (a) superior vena cava

• (b) inferior vena cava

• (c) aorta and arteries

• (d) all a, b & c

3- The heart is enclosed in a double membranous sac _____:

• (a) pleural cavity

• (b) abdominal cavity

• (c) thoracic cavity

• (d) pericardial cavity

4- The blood is passed onto right ventricle through:

• (a) bicuspid valve

• (b) tricuspid valve

• (c) semilunar valve

• (d) sino-atrial node

5- At the base of aorta, coronary arteries, arise and supply blood to the:

• (a) heart

• (b) shoulder

• (c) neck

• (d) face

6- Look at the diagram of a heart. Which vessel is a vein carrying oxygenated blood?

• (a) 2

• (b) 3

• (c) 1

• (d) 5

7- Blood enters the left atrium (left auricle) of the heart through

• (a) the aorta

• (b) the bicuspid valve

• (c) the posterior vena cava

• (d) the pulmonary vein

8- Which statement explains why humans are said to have a double circulation?

• (a) As blood circulates it passes twice through the heart

• (b) Each side of the heart has two chambers

• (c) Each side of the heart has two valves

• (d) there are two different sets of arteries leaving the heart

9- Which chambers of the human heart contain oxygenated blood?

• (a) left atrium and left ventricle

• (b) left atrium and right ventricle

• (c) right atrium and left ventricle

• (d) right atrium and right ventricle

10- The flaps of tricuspid valves are attached with fibrous cords called chordae tendinae to papillary muscles of:

• (a) ventricle

• (b) atrium

• (c) sinus venosus

• (d) aorta