Cardiovascular System- Heart

Question 1

Why is the heart positioned under the sternum

Answer 1

Protection

Question 2

The outside of the heart is surrounded by a twin-layered sac, this is known as?

Answer 2

Pericardium

Question 3

Why is the pericardial fluid important?

Answer 3

To prevent friction

Question 4

State the 3 layers of the heart?

Answer 4

Epicardium (outer layer)
Myocardium (strong middle layer, forming most of the hearts wall)
Endocardium (inner layer)

Question 5

Label the 4 chambers of the heart?

Answer 5

Right Atrium
Left Atrium
Right Ventricle
Left Ventricle

Question 6

The right atrium: This chamber supplies deoxygenated/oxygenated blood at a lower/higher pressure and moves blood down to the right/left ventricle

Answer 6

The right atrium: This chamber supplies deoxygenated blood at a lower pressure and moves blood down to the right ventricle.

Question 7

The left ventricle: This chamber supplies deoxygenated/oxygenated blood at a lower/higher pressure and moves blood to the lungs/body.

Answer 7

The left ventricle: This chamber supplies oxygenated blood at a higher pressure and moves blood to the body.

Question 8

State all the parts of the heart

Answer 8

Inferior vena cava.
Superior vena cava.
Right atrium.
Tricuspid valve.
Right Ventricle.
Pulmonary (semilunar valve).
Pulmonary artery.
Pulmonary Vein
Left Atrium
Bicuspid Valve
Left Ventricle
Aorta