Chapter 3: Organs Of The Lymphatic System Flashcards
What are Lymph nodes (1)?
Are small structures that work as filters.
What does Lymph nodes contain?
Contain specialized white blood cells (lymphocytes and macrophages) that destroy harmful substances in the lymph before it returns to the bloodstream.
How many Lymph nodes does the human body has?
There are hundreds of Lymph nodes throughout the body.
Where does Lymph nodes are clustered?
In areas where the lymphatic vessels branch off-the groin (inguinal nodes), the armpits (axillary nodes), and the neck (cervical nodes)
What are Tonsils?
Tonsils are clusters of the lymphatic tissue just under the mucous membranes that line the nose, mouth and throat.
What does Lymphocytes and Macrophages provide in the Tonsils?
They provide protection against harmful substances that may enter the body through the nose and mouth.
What is the largest Lymphatic organ in the body?
The Spleen
What is the function of the Spleen?
Spleen filters foreign substances from the blood in much the same ways as lymph nodes filter lymph.
What is the function of the Thymus Gland?
The primary function of the Thymus Gland is the development of T-lymphocytes or T cells, an extremely important type of white blood cell.
What happens after T cells have matured?
They enter the bloodstream and go to the other lymphatic organs where they defend the body from potentially deadly pathogens like bacteria, viruses and fungi.
What happens after the Lymphatic system drains interstitial fluid from the tissue spaces?
It returns it to the Venous Circulatory System through lymph capillaries.
Where does the lymph capillaries begin as blind end tubes are located?
They are located next to cells and blood capillaries.
Once the Interstitial Fluid enter the lymph capillaries it is called?
Lymph.
Why does Lymphatic vessels unite?
To form Lymphatic trunks.
Where does Lymphatic trunks empty?
Into the thoracic duct and right lymphatic duct, which then empty into the right and left subclavian veins.
Why does Lymph nodes produce Lymphocytes?
To help develop immunity to disease.
What stimulates the Immune response and Macrophage activity?
Any foreign substance that enters the Lymph node.
How is the Circulation of Lymph maintained?
By normal skeletal muscle activity such as movement, breathing and smooth muscle contraction.
What does Tonsils do?
Filter microorganisms form the nose and oral cavity.
What does Spleen do?
Filters blood via splenic artery and vein, phagocytizes bacteria, worn-out platelets and red blood cells. Releases hemoglobin to be recycled, produces lymphocytes and plasma cells, stores blood and acts as a blood reservoir.
What does Thymus help develop?
T-lymphocytes.
What is the function of Payer’s patch’s macrophages?
Prevent bacteria from infecting the intestines.
What are Lymph nodes (2)?
Small bean-shaped structures located in the lymph vessels.
What happens when lymph passes through the nodes?
Harmful substances are removed by the cells of the immune system that are housed here.
