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THYMUS -
It is derived from the endoderm of the embryo.
Structure. The thymus gland is located in the upper part of the thorax near the heart. It is a soft, pinkish, bilobed mass of lymphoid tissue. It is a prominent gland at the time of birth but it gradually atrophies In the adult.
Hassall's corpuscles are spherical or oval bodies present in the thymus. They are phagocytic in function.
Hormone. Thymus secretes a hormone named thymosin which stimulates the development of certain kinds of white blood cells involved in producing immunity. It also hastens attainment of sexual maturity.
Thymosin hormone stimulates the lymphocytes to destroy the antigens produced by bacteria or pathogen. It self may be destroyed by these lymphocytes.
N a ture of viruses Viruses vary in their size ranging from 20 nm (200 Ao) to 350 nm (3,500 Ao) and in shapes from spherical to bullet, rod, brick or filamentous forms. Some
Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which
please give us this phylem''s example...
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A patient has a low red blood cell count, and microscopic examination reveals an abnormally high proportion of circulating reticulocytes. Upon subsequent examination, the patient i
If a person is heterozygous for the 32 allele of the CCR5 gene, how many of the four daughter cells produced by meiosis will have the 32 allele?
General characteristics of phylum
Assume you were given a mixture consisting of one molecule each of all possible sequences of a smallish protein of molecular weight 4800 daltons. If the average molecular weight of
P A TTERN OF GROWTH - 1 . ISOMETRIC - In it an organ grows at the same rate as the rest of body. External form of body is not changed. eg. fish, locust. 2 .
Q. Write the meaning of Polyuria? Increased Urine (Polyuria): When sugar is increased in the blood it is filtered from the body along with the water. This is the reason for fre
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