Grade 11 Exam > Grade 11 Notes > Biology for Grade 11 > Thymus Gland
Thymus Gland | Biology for Grade 11 PDF Download
Thymus Gland
- This is situated in the anterior part of heart called mediastinal space. It is a bilobed gland. It is originated by third branchial pouch of embryo, i.e. it is endodermal in origin.
- Thymus gland is well developed in a new born child, but it reduces continuously from adulthood to old age. It remains in the form of a string at last.
- Its structure is just like a lymph gland. It is covered by connective tissue coat capsule and internally both the lobes are redividing in to small lobules.
- Each lobule has a dense, darkly staining peripheral cortex and a looser lightly staining central medulla.
- The cortex consists of densely packed lymphocytes.
- The medulla consists of reticular epithelial cell, a few lymphocytes and the "Corpuscles of Hassalls" or thymic corpuscles.
- Thymus gland is related to immune system of body.
Hormones and Functions of Thymus Gland
- Thymus gland secretes thymosin or thymin hormone, that is proteinaceous in nature/Polypeptide.
- This hormone helps in immune system of the body.
- Hassall's corpuscles are found in thymus gland, these are also called thymic corpuscles or epithelial cell or reticular cell, they act as phagocytes.
- After the birth, T - Cells or T - lymphocytes are matured in thymus gland, then these lymphocytes are releases by thymus gland, reach to lymphatic organs like spleen, payer's patches and lymph nodes & deposited in it.
- Thymosin hormone stimulates the maturation of lymphocytes to destroy the antigens produced by bacteria or pathogen.
- According to one of the theories of Ageing the decline an disappearance of Thymus gland by middle age is the primary cause of ageing.
- Thymosin helps in the development of sex gland but inhibits sexual maturity in early young age.
- Thymus provide cell mediated immunity so thymus is also called "Throne of immunity" or "Training school of T-lymphocytes".
- Thymosin also premote production of antibody to provide humoral immunity.
- Secretion of thymin decreases the neuromuscular transmission, so hyper secretion of thymine may cause myasthenia gravis. It provides the antibody against receptor & block the NM junction.
The document Thymus Gland | Biology for Grade 11 is a part of the Grade 11 Course Biology for Grade 11.
All you need of Grade 11 at this link: Grade 11
|
223 videos|325 docs|294 tests
|
FAQs on Thymus Gland - Biology for Grade 11
| 1. What is the thymus gland and where is it located? |  |
Ans. The thymus gland is a small organ located in the upper chest, behind the breastbone and in front of the heart. It is an essential part of the immune system and plays a crucial role in the development and maturation of T-lymphocytes, a type of white blood cell.
| 2. How does the thymus gland contribute to the immune system? | |
Ans. The thymus gland is responsible for the production and maturation of T-lymphocytes, which are crucial for the body's immune response. T-lymphocytes help identify and destroy harmful pathogens such as viruses, bacteria, and cancer cells. The thymus gland plays a vital role in training these immune cells to recognize and attack specific targets.
| 3. What happens to the thymus gland as we age? | |
Ans. The thymus gland is most active during childhood and adolescence. However, as we age, the thymus gland gradually shrinks and becomes less active. This process, known as thymic involution, leads to a decline in the production and maturation of T-lymphocytes. Consequently, our immune system becomes less efficient in fighting off infections and diseases.
| 4. Can the thymus gland be affected by diseases? | |
Ans. Yes, the thymus gland can be affected by various diseases. One common condition is thymoma, a tumor that originates in the thymus gland. Thymomas can be benign or malignant and may require surgical intervention. Additionally, autoimmune diseases such as myasthenia gravis and thymic hyperplasia can also impact the functioning of the thymus gland.
| 5. Can the removal of the thymus gland affect the immune system? | |
Ans. The removal of the thymus gland, known as thymectomy, can potentially affect the immune system. However, the impact varies depending on the individual and age at which the thymus is removed. In children, thymectomy may lead to immune deficiencies and increased susceptibility to infections. In adults, the impact is less significant as the thymus gland's role in immune function decreases with age.
About this Document
|
4.88/5 Rating |
|
Nov 21, 2024 Last updated |
Document Description: Thymus Gland for Grade 11 2024 is part of Biology for Grade 11 preparation.
The notes and questions for Thymus Gland have been prepared according to the Grade 11 exam syllabus. Information about Thymus Gland covers topics
like Thymus Gland and Thymus Gland Example, for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Thymus Gland.
Introduction of Thymus Gland in English is available as part of our Biology for Grade 11
for Grade 11 & Thymus Gland in Hindi for Biology for Grade 11 course.
Download more important topics related with notes, lectures and mock test series for Grade 11
Exam by signing up for free. Grade 11: Thymus Gland | Biology for Grade 11
Description
Full syllabus notes, lecture & questions for Thymus Gland | Biology for Grade 11 - Grade 11 | Plus excerises question with solution to help you revise complete syllabus for Biology for Grade 11 | Best notes, free PDF download
Information about Thymus Gland
In this doc you can find the meaning of Thymus Gland defined & explained in the simplest way possible. Besides explaining types of
Thymus Gland theory, EduRev gives you an ample number of questions to practice Thymus Gland tests, examples and also practice Grade 11
tests
|
Explore Courses for Grade 11 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Extra Questions
,shortcuts and tricks
,Summary
,Important questions
,Thymus Gland | Biology for Grade 11
,study material
,Semester Notes
,past year papers
,ppt
,Viva Questions
,video lectures
,Previous Year Questions with Solutions
,Sample Paper
,practice quizzes
,Free
,Exam
,mock tests for examination
,MCQs
,Thymus Gland | Biology for Grade 11
,Thymus Gland | Biology for Grade 11
,Objective type Questions
;
Additional Information about Thymus Gland for Grade 11 Preparation
Thymus Gland Free PDF Download
The Thymus Gland is an invaluable resource that delves deep into the core of the Grade 11 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Thymus Gland now and kickstart your journey towards success in the Grade 11 exam.
Importance of Thymus Gland
The importance of Thymus Gland cannot be overstated, especially for Grade 11 aspirants.
This document holds the key to success in the Grade 11 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Thymus Gland Notes
Thymus Gland Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Thymus Gland.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Thymus Gland Notes on EduRev are your ultimate resource for success.
Thymus Gland Grade 11 Questions
The "Thymus Gland Grade 11 Questions" guide is a valuable resource for all aspiring students preparing for the
Grade 11 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Thymus Gland on the App
Students of Grade 11 can study Thymus Gland alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Thymus Gland,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Thymus Gland is prepared as per the latest Grade 11 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup