Define meosis and mitosis

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 Meosis

Meosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information.These cells are sex cells sperm in males and eggs in females.

Mitosis

Cell division responsible for the growth and replacement of older cells by the formation of newer ones is known as Mitosis. This cell division produce two daughter cells which are identical and similar to the mother

Write the location and function of epithelial tissue#

The epithelial tissue is type of body tissue that forms the covering on all internal and external surfaces of body,lines body cavity and hollow organs and is the major tissue in glands.
There are following function of this tissue
*protection  *secretion  *absorption
*excretion   *filtration  *diffusion
*sensory reception

Define astigmatism#

A defect of an optical system (such as a lens) causing rays from a point to fail meet in a focal point resulting in a blurred and imperfect image.

Difference between paracrine and exocrine#

Paracrine is describing a hormone or other secretion released from endocrine cells into the surrounding tissue rather than into the bloodstream while exocrine is producing external secretions that are released through a duct

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