Question

Answer the following question 1(a) to 1(e) on the basis of your understanding of the following paragraph and the related studied concepts:
The separation of right side and left side of the heart is useful to keep oxygenated and deoxygenated blood from mixing. Such separation allows a highly efficient supply of oxygen to the body. This is useful in animals that have high energy needs, such as birds and mammals.
1(a)What is the double circulation?
1(b)Why arteries have thick, elastic walls?
1(c)The smallest vessels have walls which are one cell thick, write reason for same?
1(d)Write the role of blood.
1(e)Name various components of blood.​

Answer 1

Answer:

1(a) double circulation is the separation of oxygenated blood and deoxygenated blood

1(e)lymph, RBC,WBC,PLATELETS

Answer 2

1)double circuit separate the oxygenated blood and deoxygenated blood by forming artery and vein
2)arteries are thick because of blood pressure is high
3)they are capillaries
4)main role of blood is to transport material allover the body
5)Rbcs and wbcs and platelets