Summary
Summary - Histology of lymphoid organs
- Course
- Institution
The histology of lymphoid organs is summarized with important key points that are important. Detailed explanation of the lymphoid organs.
[Show more]
Seller
Follow
SaraaRA
Content preview
Histology, ~
Histology of Lymphoid Organs
Lymphoid Organs:
Lymphoid
·
system is responsible for the immunological defense of the body Lymphoid organs
. are
designed to
gather
& destroy infectious microorganisms & to store lymphocytes .
· Two
categories :
"Primary central Lymphoid organs : responsible for the development of lymphocytes into mature immunocompetent cells
.
~
Fetal liver, prenatal & postnatal bone marrow , a thymus
2 Secondary (peripheral) Lymphoid organs : Responsible for the proper environment in which immunocompetent cells can react with
eachother ,
along with
antigens &other cells to mount an
immunological challenge agains invading antigens or
pathogens .
~
Lymph nodes , spleen, I mucosa associated Lymphoid tissue .
Thymus:
A lymphoid organ located in the mediastemum It is mostly active
central .
during youth.
It is the site of maturation of T dymphocytes & secretes thymic hormones such as thymosin thymopoietin thymulin a
, , ,
thymic humoral factor .
* It differs from other lymphoid organs since it functions strictly in lymphocyte maturation . It also consists of thethymic epithelial cells .
* Cortex of thymus :
Contains
developing
~
thymocytes (T Lymphocytes) Macrophages
, &,
~
Thymic cortical epithelial cells . These cells are linked to eachother by
desmosomes that surround the capillary.
A dual basal
Lamina is present in the space between epithelial cells & capillaries.
~
The thymic endothelial cells , basal Lamina, & endothelial cells form the
functional blood thymus -
barrier. It prevents the contact of
antigenic material
with the
developing
Flymphocytes .
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SaraaRA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77333 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now