Lymphoid Tissue and Organs Overview

What is one primary function of the spleen?

Which structure serves a similar purpose to lymph nodes in eliminating external waste?

What happens to the function of the spleen if it is removed?

How does the immune system respond to invading microorganisms?

What percentage of platelets does the spleen store?

What is the primary function of the immune system?

What type of stem cells are found in the bone marrow?

Where do B lymphocytes mature?

What is the role of the thymus in the immune system?

What are lymph nodes primarily responsible for?

Which type of lymphocyte has receptors in the form of antibodies?

What is the location of the spleen in the human body?

What happens to the thymus after a child matures?

Lymphoid Tissue and Organs

The immune system has central and peripheral components.
Central components include the bone marrow and thymus.
Bone marrow generates various types of blood cells, including immune system cells, through hematopoiesis.
The thymus matures T lymphocytes after they differentiate from stem cells in the bone marrow.

Peripheral Lymphoid Tissue and Organs

Peripheral tissues include lymph nodes, lymphatic vessels, and the spleen.
Lymph nodes are small, oval structures located along lymphatic ducts, filtering antigens from blood and lymph.
The spleen is the largest lymphoid organ, located in the upper left abdomen, responsible for filtering blood, removing damaged cells, storing blood and platelets, and initiating immune responses.

Accessory Lymphoid Tissue and Organs

Tonsils, adenoids, appendix, and Peyer's patches function similarly to lymph nodes, removing external waste and located in areas susceptible to microorganism entry.

Function of the Immune System

The immune system is a defense mechanism against invading microorganisms and toxins, preventing tissue damage.
It identifies and eliminates antigens, including bacteria, fungi, viruses, and parasites.
It maintains the body's internal environment by removing dead or damaged cells.
The immune system employs three strategies:
- Surface phenomena
- Host defenses
- Specific immune responses

Explore the key components of the immune system, including central and peripheral lymphoid tissues. This quiz covers the functions of bone marrow, thymus, lymph nodes, and the spleen, as well as accessory lymphoid organs like tonsils and adenoids. Test your knowledge on how these organs contribute to immune responses.