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All living organisms are composed of structural and functional units called cells. The body of a living organism may be composed of a single cell - as in unicellular organisms or many cells - as in multicellular organisms. The number of cells in the body of multicellular o..

All living organisms are composed of structural and functional units called cells. The body of a living organism may be composed of a single cell - as in unicellular organisms or many cells - as in multicellular organisms. The number of cells in the body of multicellular organi..

Phloem or bast is also a conducting tissue and is composed of elements of different kin..

In the cells of fungi, the cellwall is generally composed of chitin, a polysaccharide. The chitin molecules also occur in bundles, like cellulose molecul..

From the oesphagus to rectum, the gut wall is mainly composed of two region..

All living organisms are basically composed of atoms of some chemical elements, particularly carbon, hydrogen, oxygen and nitroge..

Haemoglobin is composed of an iron containing pigment called haeme and a protein called globi..

This is a connective tissue in which the ground substance or matrix is composed of elastin, which is impregnated with salts of calcium and magnesiu..

The excretory system is represented by the kidneys, the ureters and the urinary bladder. Kidneys are composed of a large number of functional units called nephrons. Kidneys take up the function of excretion and osmoregulation. The excretory system is closely associated with the reproducti..

It is a thin, elastic, selectively permeable membrane found internal to the cell wall. It is composed of phospholipids, proteins and polysaccharides. The plasma membrane is the site of most of the metabolic pathways. Certain structures are found associated with plasma membra..