Circulatory System

Question 1

Adaptations of RBC

Answer 1

Lack of nucleus
Loss of mitochondria
No endoplasmic recticulum

Question 2

What is polycythaemia

Answer 2

Abnormal increase in number of RBCs

Question 3

What is Erythropenia?

Answer 3

Abnormal decrease in number of RBCs

Question 4

What is leukemia?

Answer 4

A cancer of the tissue that forms WBCs, which leads to fast formation of WBCs and decline of RBCs

Question 5

What is leukopenia?

Answer 5

Abnormal decrease in the number of WBCs

Question 6

Define Phagocytosis

Answer 6

Engulfing of particle-like solid substances

Question 7

Define diapedesis

Answer 7

Migration of the leucocytes through walls of blood vessels to reach germs.

Question 8

What is pus?

Answer 8

Dead white blood cells combined with damaged cells due to the infection

Question 9

What is serum?

Answer 9

The clear liquid part of plasma squeezed out during clotting

Question 10

What is haemophilia?

Answer 10

A genetic disorder in which blood does not clot properly

Question 11

What is the pericardium?

Answer 11

The double walled membranous covering around the heart filled with pericardial fluid

Question 12

Why do ventricles have thicker walls?

Answer 12

To pump blood across long distances

Question 13

Which vessel does the R.A recieve?

Answer 13

Vena cava

Question 14

Which vessel arises from R.V

Answer 14

P.A

Question 15

Which vessel arises from L.V

Answer 15

Aorta

Question 16

Which vessel does the L.A recieve?

Answer 16

P.V

Question 17

What do the coronary arteries do?

Answer 17

They supply blood to the heart muscles. Failure of these can lead to myocardial infarction

Question 18

Which side is the Tricuspid valve on?

Answer 18

Right side

Question 19

Where are the Pulmonary semilunar valves?

Answer 19

At the opening of the right ventricle into the P.A. They are pocket shaped and 3 in number.

Question 20

Where are the Aortic semilunar valves?

Answer 20

At the point of origin of aorta from the left ventricle.