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There is no substitute for blood. If people lose blood from surgery or injury or if their bodies cannot produce enough blood, there is only one way to get it — through transfusion of blood donated by volunteers. Blood is usually in short supply. Donating blood does not decrease the strength of the donors.

Transpiration generates a force which pulls up water absorbed by the roots from the soil, to reach the stem and leaves.

A lot of water is lost by plants in the form of vapour through stomata during transpiration.

The vascular tissue for the transport of food to the various parts of the plant is phloem

Nutrients are transported along with water to the entire plant via the vascular tissue called xylem.

Salts and urea are removed along with water as sweat.

Removal of waste products from the body is called excretion.

The water evaporates through the stomata present on the surface of the leaves by the process of transpiration. The evaporation of water from leaves generates a suction pull (the same that you produce when you suck water through a straw) which can pull water to great heights in the tall trees. Transpiration also cools the …

What is Transpiration ? Read More »

The food has to be transported to all parts of the plant. This is done by the vascular tissue called the phloem.