Human beings like other multicellular organism need regular supply of food, oxygen etc. This function is performed by circulatory system.
Blood travels twice through the heart in one complete cycle of the body.
- Pulmonary Circulation : Blood moves from the heart to the lungs and back to the heart.
- Systemic Circulation : Blood moves from the heart to rest of the body and back to the heart.
Lymph - a yellowish fluids escapes from the blood capillaries into theintercellular spaces contain less proteins than blood. Lymph flows from the tissues to the heart assisting in transportation and destroying germs.
Transpiration - It is the process of loss of water as vapour from aerial parts of the plant.
(a) Absorption and upward movement of water and minerals by creating PULL.
(b) Helps in temperature regulation in plant.
Translocation - Transport of food from leaves (food factory) to different part of the plant is called Translocation.