Describe the flow of blood through the heart of human beings.

Describe the dispersal of seeds through human beings.

Describe double circulation of blood in human beings. Why is it necessary?

Which diagram is correct for the circulation of blood through human heart?

In which of the following groups of organisms, blood flows through the heart only once during one cycle of passage through the body?

What is the time taken for the supply of 1ml of blood from heart to a foot and back in human beings?

The direction of blood flow in the heart of cockroach is

Describe the internal features of human heart.