the human lymphatic system all cells of the body are bathed in a colorless watery fluid called...
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The Human Lymphatic System
All cells of the body are bathed in a colorless watery fluid called intercellular fluid (tissue fluid).
The Human Lymphatic System
Intercellular fluid contains: - water - protein - wastes
- salts - nutrients
It helps to move materials between capillaries and body cells
Exchange of materials occurs through this fluid
The fluid is formed from blood plasma that diffuses out of the capillaries
Functions of Lymphatic System
The excess fluid and proteins from the intercellular spaces are returned to the blood by lymphatic system.
It helps maintaining the fluidity of blood and prevents the swelling of tissue by accumulation of excess fluid.
It transports fatty acids, glycerol and fat soluble vitamins.
It defends the body against diseases by immune mechanisms.
Parts of Lymphatic System
Lymphatic system is composed of:
lymph
lymph capillaries
lymph vessels
lymph nodes (contain lymphocytes and macrophages)
lymph organs/glands: spleen, tonsils, thymus
Spleen: - located near stomach
- filters out bacteria
- worn out red blood cells from blood
Thymus: - located in the middle of the chest
- provide growth and immunity
- gets smaller when the organism gets older
- secretes thymosin (helps T lymphocytes to become mature)
Parts of Lymphatic System
Lymphatic capillaries are tiny vessels of the lymphatic system.
Near each cell there are lymph capillaries.
Their one end is closed.
When water and proteins enter lymph capillaries they are called lymph.
Lymph capillaries are made up of squamus epithelial cells, they are more permeable then blood capillaries.
Parts of Lymphatic System
Lymph Glands
play role in body defense against disease
filter foreign matters from lymph (such as cancer cells, bacteria)
produces lymphocytes
*** If there is an infection they get enlarged.
The Ways of LymphFat soluble
vitamins +
Fatty acids +
Glycerol (from small intestine)
absorbed by lacteals
Lower parts of the body, left arm, left side of head
and chest
Lymph reservoir (peke sarnıcı)
Thoracic duct (göğüs kanalı)
Left subclavian vein (sol köprcücük altı
toplardamarı)
From the left side of the neck
Superior vena cavaRight atrium
The Ways of Lymph
Right side of the head and chest,
right arm
Right lymph duct
Right subclavian vein (sağ
köprücükaltı toplar damarı)
Superior vena cava
Right side of the neck
Right atrium
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