The figure given below represents human female reproductive system. Study the figure and answer the questions that follows.

(a) Name the parts A, B, C, D and E.

(b) Identify the structure, which produces ovum and the structure that pushes the released ovum into oviducts.

(c) Which process takes place in B?

Expand the abbreviation ABA.

How is the colour of an object perceived in humans?

Comment briefly on the structure and composition of blood.