Unit 1: Lymphatic System Flashcards
The lymphatic system
Works closely with the cardiovascular system to maintain hemostasis in the human body
Functions of lymphatic system
Fluid balance, dietary fat absorption and defense against disease
Contains lymph (liquid) and lymphatic organs throughout the body
Lymph
Fluid in lymphatic system that regulates fluid levels and protects against disease
Enters lymphatic system through lymphatic capillaries
Major lymphatic ducts
Right and thoracic (left, drains both legs and left arm and left of head)
Order fluid moves
- Lymphatic capillaries
- Lymph ducts
- Lymph ducts
Lymphatic capillaries
Smallest lymphatic vessels thin and blind ended
Lymph vessels
Mid sized vessels
Thymus gland
Located in the mediastinum of the thoracic cavity
Shrink in size and activity as we get older
Red bone marrow
found in some bones in adults and most in children
Red blood cells are formed here
Lymph nodes
Nodules located in specific areas
Cleanses the lymphatic fluid
Spleen
Largest lymphatic organ behind stomach
Red pulp filters blood and white pulp contains lymphocytes
Peyers patches
Secondary lymphatic organ inside the wall of the intestines
Protect against pathogens that can enter body through digestive tract
Tonsils
Located in the throat
Protects against pathogens that enter the nose or mouth
Non-specific innate immunity
First line- skin, mucus, saliva
Second line- fever, inflammation, interferons, phagocytes…
Interferons
Proteins that protect the body against viral infections
