Ageing, Biology

AGEING -

The appearance of some changes as the body grows older is called ageing. It ultinately leads to death.

It can be defined as deteoration in structure and function of the body cells, tissues & organs of individual.

All living being have a specific life span. Maximum life span in tortoise.

MORPHOLOGICAL AND PHYSIOLOGICAL CHANGES -

1.      Decreased efficiency of heart to pump blood.

2.      Reduction in the number of nephrons & taste buds.

3.      Less formation of R.B.C.

4.      Cells loss the capacity to retain water.

5.      Skin becomes dry and wrinkeled.

6.      Formation of urine is less.

7.      Muscles become weak.

8.      Bones become brittle.

CELLULAR CHANGES -

1.       Increased number of chromosomal aberration in liver cell.

2.       Greater amount of defective proteins in cell.

3.       Accumulation of pigment.

4.       Decreased power of multiplication in cell.

EXTRA CELLULAR CHANGES -

1.       Collagen becomes less permeable, rigid & insoluble.

2.       O& nutrients do not diffuse in cell easily.

3.       Excretion is decreased.

4.         Diffusion is less. 

Posted Date: 10/4/2012 5:55:46 AM | Location : United States







Related Discussions:- Ageing, Assignment Help, Ask Question on Ageing, Get Answer, Expert's Help, Ageing Discussions

Write discussion on Ageing
Your posts are moderated
Related Questions
Permanent Wilting Percentage (PWP) It is the percentage of moisture in the soil at which a plant wilts and does not recover unless water is added to the soil. PWP for clay is

Explain the life cycle of Water? The water cycle , or hydrologic cycle, is one of the most important processes to living organisms on Earth. Consider the following facts:

PERSONNEL It is important that while allocating nursing, medical and paramedical staffs, the needs of the neonatal unit should not be ignored. The highest priority in the orga

Fate of the germ layers In cnidarians and ctenophores, all the cell types develop from either ectoderm or endoderm. Similarly all the tissues and organs in the rest of the ani

Define the Miscellaneous Applications of Sugar? Sugars are used in 1. Custards, 2. puddings, 3. pie fillings and meringues Depending on the sugar to perform vital c


Explain the Pre Pregnancy Weight and Foetal Outcome? Several studies from around the world from developing and developed countries have demonstrated an association between pre-


Particulate matter in gaseous effluents consists of particles of size ranging from 0.1 um to 100 um. The device selection is based upon physical and chemical characteristic of part

Q. What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the