Lymphatic system

• 'The lymphatic system is a network of vessels that transports lymph, a clear fluid containing white blood cells, from the tissues to the blood
• There are about 600 lymph nodes throughout the body.
• Lymph nodes filter out bacteria and other foreign substances from the lymph.
• Lymph nodes contain many immune cells such as macrophages, T-lymphocytes, B-lymphocytes, plasma cells, dendritic cells, natural killer (NK) cells, and eosinophils.
• Principal lymphoid organs are aggregations of nodes located near the body surface, specifically in the inguinal, axillary, and cervical regions.
• Lymphatic vessels are vessels that perform filtration by having macrophages destroy microorganisms and debris, and also activate the immune system by monitoring for antigens and mounting an attack against them.
• Lymphatic transport uses the movement of lymph through the lymphatic system, which lacks a pumping organ and relies on low-pressure conduits. It uses the same methods as veins to propel lymph, including pulsations of nearby arteries and contractions of smooth muscle in the walls of the lymphatics.
• Tonsils are the simplest lymph organ that manages bacteria and viruses entering the mouth and nose
• The tonsils are located at the back of the oral cavity
• Spleen is a large mass of lymph tissue located behind the stomach
• Spleen filters blood and removes old red blood cells
• Thymus gland is a small mass of lymph tissue located between the lungs
• Bone marrow is a soft spongy material found inside bones where blood cells are produced
• Adenoids are masses of lymphoid tissue located near the nasal passages
• The function of the lymphatic system is to filter debris and bacteria from the blood
• The lymphatic organs are located throughout the body
• Organs apart of the lymphatic system include lymph nodes, vessels, the spleen, thymus and tonsils