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

Oxygen dissociation curves, Oxygen Dissociation Curves The oxygen cont...

Oxygen Dissociation Curves The oxygen content of blood fully saturated or oxygenated can be calculated. It is known as the oxygen capacity of blood and this varies for differe

Limitations in the diagnostic use of stress echocardiography, Q. Limitation...

Q. Limitations in the Diagnostic use of Stress Echocardiography? Although the presence of coronary artery disease is readily recognised in the setting of multivessel disease, a

What are the symptoms causes of fever, During a fever in a human, A. sh...

During a fever in a human, A. shivering can happen when the actual body temperature is higher than the set point for body temperature during the fever. B. the control system

Facilitation model - models of succession, Facilitation Model - Models of S...

Facilitation Model - Models of Succession This is considered as the classical model of succession. It is based on the assumption that species of a previous stage are replaced

What are the main parts of ferns, What are the main parts of ferns? Fer...

What are the main parts of ferns? Ferns are constituted by small roots that come downwards from the rhizome (stem, often orizontalized). The fronds also arise from the rhizome.

Define about the iron deficiency anaemia (ida), Define about the Iron Defic...

Define about the Iron Deficiency Anaemia (IDA)? Iron deficiency anaemia (IDA) is the most common micronutrient deficiency in the world, particularly in the developing countries

Sources of water are to contain pathogenic bacteria, What sources of water ...

What sources of water are (a) most likely, (b) least likely to contain pathogenic bacteria?   (a) Water most likely to have pathogenic bacteria will be that which receives u

Describe how the international astronomical union defines, Describe how the...

Describe how the International Astronomical Union defines a planet. Also include why Pluto is no longer considered a planet.

Medicines and drugs - impacts on biodiversity, Q. Medicines and Drugs - imp...

Q. Medicines and Drugs - impacts on biodiversity? The World Health Organization (WHO) has listed over 21,000 plant names (including synonyms) that have recorded medical uses ar

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