Question

What are the advantages of having very thin and highly branched capillaries for blood flow?
What is the difference between the blood flowing in the arteries and that flowing in the veins?

Answer 1

the blood flowing in arteries is red and the blood flowing in the veins is not red they are the mixture of wbc's and rbc's and platelets

Answer 2

Hi,

Answer to the 1st question

The advantages of having very thin and highly branched capillaries are-
1)Very thin capillaries help in easy diffusion of gases.
2)Branched capillaries help the blood to reach every part of the body easily so nutrients are also transported easily to every part of the body.

Answer to the 2nd question.

Veins:
carry blood from the tissues of the body back to the heart
are usually positioned closer beneath the surface of the skin
are less muscular than arteries, but contain valves to help keep blood flowing in the right direction, usually toward the heart
would collapse if blood flow stops.
Arteries:
carry blood away from the heart to the tissues of the body
are usually positioned deeper within the body
are more muscular than veins, which helps in transporting blood that is full of oxygen efficiently to the tissues
would generally remain open if blood flow stopped, due to their thick muscular layer.

Hope it helps