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Lymphatic System
| Date post: | 07-May-2015 |
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Health & Medicine |
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Lymphatic System
Lymphatic System
• The lymphatic system is part of the immune system and helps destroy microorganisms that enter the body.
• Your lymphatic system works closely with your circulatory system. Both systems move liquids through the body, and both contain white blood cells.
FUNCTIONS of the Lymphatic System
• It absorbs some of the tissue fluid that collects around cells.
• It absorbs fats from the digestive system and transports them to the circulatory system.
FUNCTIONS of the Lymphatic System
• It filters dead cells, viruses, bacteria, and other unneeded particles from tissue fluid.
• After filtering, it returns the tissue fluid to the circulatory system.
FUNCTIONS of the Lymphatic System
• It helps fight off illnesses and infections. • The lymphatic system includes structures where your
body’s white blood cells develop.
FUNCTIONS of the Lymphatic System
PARTS of the Lymphatic System
• The lymphatic system is a network of vessels and organs that runs throughout your body.
PARTS of the Lymphatic System
• Water, white blood cells, and dissolved materials such as salts and glucose leak out of capillary walls.
• They move into the space that surrounds tissue cells. This fluid is called tissue fluid.
Lymph
PARTS of the Lymphatic System
• The cells absorb the materials they need from tissue fluid and release wastes into it.
Lymph
PARTS of the Lymphatic System
• About 90 % of the tissue fluid is reabsorbed by the capillaries.
• About 10 % of the tissue fluid is absorbed by the lymph vessels and is called lymph.
Lymph
PARTS of the Lymphatic System
• The network of lymph vessels looks like the network of blood vessels in the circulatory system.
• Lymph vessels absorb and transport lymph.
Lymph Vessels
PARTS of the Lymphatic System
• The network of lymph vessels looks like the network of blood vessels in the circulatory system.
• Lymph vessels absorb and transport lymph.
Lymph Vessels
PARTS of the Lymphatic System
• Lymph is pushed through the lymph vessels by contractions of the muscles in your body.
• The heart does not pump lymph through the body.
Lymph Vessels
PARTS of the Lymphatic System
• Lymph vessels include clusters of small, spongy structures called lymph nodes that filter particles from lymph.
Lymph Nodes
PARTS of the Lymphatic System
Lymph Nodes
PARTS of the Lymphatic System
• A lymph node traps and removes bacteria, viruses, fungi, and pieces of dead cells from the lymph as it flows through a lymph node.
Lymph Nodes
PARTS of the Lymphatic System
• Lymph nodes also store white blood cells.
• These white blood cells attack and destroy the trapped particles.
Lymph Nodes
PARTS of the Lymphatic System
• When you have an infection, your body produces more white blood cells that fight the infection.
• Many of these white blood cells gather in your lymph nodes.
• This causes the lymph nodes to swell. • The swelling goes away when the infection is gone.
Lymph Nodes
PARTS of the Lymphatic System
Lymph Nodes
PARTS of the Lymphatic System
Lymph Nodes
PARTS of the Lymphatic System
Lymph Nodes
PARTS of the Lymphatic System
• Some white blood cells are lymphocytes.
• Lymphocytes destroy pathogens, which are microorganisms such as viruses and bacteria that cause infection.
Lymphocytes
PARTS of the Lymphatic System
Lymphocytes
• Lymphocytes include B cells and T cells.
• B cells mature in bone marrow.
• T cells mature in thymus gland.
PARTS of the Lymphatic System
Lymphocytes
• The thymus is the organ of the lymphatic system in which T cells complete their development.
• Immature T cells move from the bone marrow to the thymus.
PARTS of the Lymphatic System
Lymphocytes
• T cells in the thymus develop the ability to recognize and destroy body cells that have been infected by microorganisms.
• Mature B cells and T cells move into the lymph and blood where they help fight infection.
PARTS of the Lymphatic System
• The spleen is an organ of the lymphatic system that recycles worn-out red blood cells and produces and stores lymphocytes.
Spleen
PARTS of the Lymphatic System
• The spleen also stores blood and platelets. • If a person is injured and loses a lot of blood, the spleen
can release stored blood and platelets into the circulatory system.
Spleen
PARTS of the Lymphatic System
• Tonsils are clusters of lymph tissue on the sides of your throat.
• They help protect your body from infection.
Tonsils
PARTS of the Lymphatic System
• Tonsils are clusters of lymph tissue on the sides of your throat.
• They help protect your body from infection, trapping & destroying bacteria and other pathogens that enter your nose and mouth.
• However, your body can function without tonsils.
Tonsils
PARTS of the Lymphatic System
Tonsils
Lymph Diseases and Disorders
• Damage to the lymphatic system from injury or surgery can keep tissue fluid from draining into lymph vessels.
• Tissue fluid can build up around cells and cause swelling. • Lack of activity can also cause
swelling. • When the muscles do not push
lymph through the lymph vessels, lymph can build up.
Lymph Diseases and Disorders
• If the cells of your tonsils become infected, your tonsils will swell. This condition is tonsillitis.
Lymph Diseases and Disorders
Lymph Diseases and Disorders
• The uncontrolled production of white blood cells is a type of cancer called lymphoma.
• Cancer of the lymph nodes is a related disease called Hodgkin’s lymphoma.
Lymphatic System and Homeostasis
• The lymphatic system helps your body maintain homeostasis by keeping tissue fluids from building up around cells.
• It supports your circulatory system by cleaning fluids and replacing them in the bloodstream.
• It also helps you stay healthy by fighting infection.
