Immune System Antonio Lara Per.2
Major functions of the Lymphatic & Immune systems
Lymphatic systems
Collects and carries away excess tissue fluid from interstitial spaces, eventually returning into the blood.
Lymph nods, which are situated along lymphatic vessels, contain lymphocytes, which help defend body against disease.
the walls are thinner than those of veins, but are constructed with the same 3 layers
Location of Lymphatic organs and their functions
Organs
Thymus
Spleen
Lymph nodes
Are located in groups or chains along lymphatic vessels
It shrinks in size during lifetime
Lies in the upper left abdominal cavity
Largest lymphatic organ in body
It filters the blood and removes damaged cells and bacteria
Purpose and examples of First, Second and Third line of defense
includes macrophages (phagocyte white blood cells) (non-specific)
Includes B and T cells (lymphocutes - specific type of white blood cells )
Includes skin and mucous membranes(non-specific)