Double Circulation

Assertion : Double circulation is incomplete in amphibians and reptiles Reason : Unlike in birds and mammals, in amphibian and reptiles, the left atrium receives oxygenated blood and right atrium receives deoxygenated blood.

Circulation-2

Select the correct statement(s) about lymphatic system from the following. Lymphatic system returns the excess tissue fluid back to blood. Lymph vessels contain no valves. The lymph moves with pumping of heart. Lymph also has double circulation like heart.

(a) What is meant by human circulatory system ? Name the organs of the circulatory system in human (b) Draw a diagram of the human heart and lebel its parts (c) What is mean tby the terms 'single circulation' and 'double cirulation '?

11. Body Fluids And Circulation_Regulation Of Circulation

Open blood circulation is found in

Explain the blood circulation in humans.

Boold circulation in insects :

General Circulation Of The Atmosphere