Thymus, Biology

Assignment Help:

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.


Related Discussions:- Thymus

What is optic nerve, What is optic nerve The optic nerve contains more...

What is optic nerve The optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina. This structure originatcs at the back of the e

Nutritional needs and recommended allowances for proteins, Define Nutrition...

Define Nutritional Requirements and Recommended Allowances for Proteins and Amino Acids? The FAO/WHO Committee (1973) expressed the protein requirements in terms of egg or milk

Differenciate b/w gymnosperms -pteridophytes- bryophytes, How different are...

How different are gymnosperms from pteridophytes and bryophytes? Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form see

Define changes associated with the skeletal system - ageing, Define Changes...

Define Changes associated with the skeletal system - Ageing? Skeletal bone loss occurs with ageing and may have serious consequences among the elderly. With ageing, there is so

Genetic diversity of population, Genetic Diversity of Population The b...

Genetic Diversity of Population The biological diversity of animals, plants, and microorganisms is of fundamental importance to human survival. The term "gene resources" may b

What is av block, Q. What is AV Block ? First Degree AV Block At ...

Q. What is AV Block ? First Degree AV Block At rest commonly disappears with exercise owing to the vagal withdrawal. The development of a prolonged PQ segment after exerc

Digestive system, I want to know how does our digestive system work

I want to know how does our digestive system work

Explain irradiation, Explain Irradiation The physical process of expos...

Explain Irradiation The physical process of exposing an object, system, or a material to a high radiant energy for the sterilization or preservation.

Excretion, living organisms and their excretory products

living organisms and their excretory products

GRADE 8 SCIENCE, what effects do human technologies have on our water syste...

what effects do human technologies have on our water systems?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd