types of regeneration -reparativerestorative1 it
TYPES OF REGENERATION -
Reparative
Restorative
1. It is limited to healing of wounds or replacement of cells
It can replace the lost part of body or produce a
complete organism from fragment
2. It involves minor cell proliferation & migration
It involves cell reproduction and differentiation
3. It occurs in all animals
Mainly in lower anim als
eg. Repair of a cut
1. Starfish
Replacement of skin cells , intestinal cells , blood cells
2. Wall lizard
3. Salamender
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kinds of growth -1 auxetic growth -body grows by enlargement of its cells without increase in number of cellseg nematodes
growth rate in animals -growth rate is different at different periods of lifegrowth period in human may be studied in 5 steps -i prenatal - in
pattern of growth -1 isometric -in it an organ grows at the same rate as the rest of body external form of body is not
regeneration -natural ability of living being to replace worn out parts to repair damaged parts to regrow cost off organs amp to reform entire body
types of regeneration -reparativerestorative1 it is limited to healing of wounds or replacement of cellsit can replace the lost part of body or
mechanism of regeneration -th morgan recognised 2 primary mechanisms -morpholaxisepim orphosis1 production of entire animal from a small fragmentit
ageing -the appearance of some changes as the body grows older is called ageing it ultinately leads to deathit can be defined as deteoration in
theories of ageing -1 compromise theory2 wear amp tear theory3 somatic mutation
death -it is terminal end of the degeneration changes of old agedeath occurs when vescular system amp respiratory system stop workingfailure of
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