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Tuesday, 06 June 2017 17:14

AN ANIMAL CELL STRUCTURE

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Cell is a fundamental, structural and functional unit of living organism. The science which deals with cells and their organelles is called cell-biology. The term cell was first used by…
The cytoplasm of the animal cell is bounded by a thin limiting membrane called "Cell membrane".   Nageli and Cramer called this membrane as cell membrane in 1855. In 1931…
Tuesday, 06 June 2017 19:18

STRUCTURE AND FUNCTION OF MITOCHONDRIA

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DEFINITION OF MITOCHONDRIA:   Mitochondria are center for cellular respiration. It converts chemical energy into kinetic energy.   Information About Mitochondria   In 1857 Kolliker observed mitochondria and called them…
Wednesday, 07 June 2017 06:35

STRUCTURE AND FUNCTIONS OF LYSOSOMES

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Lysosome:   These are first ob­served in liver cells. They are 1.5 to 2 milii micron in size These are single mem­brane bounded structures. They were first called pericanalicular-dense bodies.…
In the animal and plant cells clus­ters of fat filled structures are present. They are called Golgi apparatus or complex. In 1898 Camillo Golgi' recognised it in the nerve cell…
In the cytoplasm of the cell complex membrane bounded system is present. It was called cytoplasmic vacuolar system by "Sacz & De robertis" in 1975. This system contains endoplasmic reticule,…
Wednesday, 07 June 2017 17:29

STRUCTURE AND FUNCTION OF CELL NUCLEUS

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In 1832 "Robert Brown" discovered nucleus. It is the essential part of the cell.   A definite nucleus is absent in prokaryotic cell. Instead of it a DNA molecules is…