Question

showing the role of a special structure in their walls:
Direction of
blood flow
(1) Name the kind of blood vessels shown.
(ii) Name the structure shown inside the blood vessels.
(iii) Describe the role of these structures.
(iv) Define portal vein.
(v) Towards which side of the figure (top or bottom) is the heart located?​ ​

Answer 1

Answer:

1 Artery

2 Valves

3 these structures regulate the flow of blood in one direction

4 ##

5 Towards bottom

Answer 2

Ques : Name the kind of blood vessel shown.

• The blood vessels shown here are Veins.

Ques : Name the structure shown inside the blood vessels.

• Valves are the structure shown inside the blood vessels.

Ques : Describe the role of these structures.

• These valves prevent the backflow of the blood.

Ques : Define portal vein.

• A portal vein is one which start with capillaries and also ends in capillaries.

Ques : Towards which side of the figure (top or bottom) is the heart located?

• The heart is located towards the top of the figure (veins carry blood away from the organs to the heart, except pulmonary vein)