Lymphatic System Flashcards
Lymphatic system functions
Fluid balance in tissues, absorption of lipids from the small intestine and defends against pathogens
The lymphatic system includes
Lymph, lymphocytes, lymphatic vessels, lymph nodes, the tonsils , the spleen and the thymus.
Lymphatic route
Fluid moves from blood capillaries into the tissue spaces. Most of the fluid returns to the blood but some of the fluid moves from the tissue spaces into lymphatic capillaries to become lymph.
Lymphatic capillaries
Tiny closed ended vessels consisting of simple squamous epithelium
Lymphatic capillaries are not present where
Central nervous system, bone marrow and tissues lacking blood vessel such as the epidermis and cartilage .
Three factors that causes compression of the lymphatic vessels
Contraction of surrounding skeletal muscle during activity, periodic contraction smooth muscle in the lymphatic vessel wall and pressure changes in the thorax during breathing
Where does the lymphatic vessels converge and empty
Right lymphatic duct: right upper limb and the right half of the head, neck, and chest. Which empties at the right subclavian vein
Thoracic duct: lymphatic vessels from the rest of the body empties at the left subclavian vein
Lymphatic organs includes
Tonsils, the lymph nodes, the spleen , and the Thymus
Three groups of tonsils
The paired palatine tonsils, the pharyngeal tonsils, and the lingual tonsils
Removal of the pharyngeal tonsils
Tonsillectomy
Removal of the palatine tonsils
Adenoidectomy
There are three superficial aggregation of lymph nodes on each side of the body
Inguinal lymph nodes in the groin, the axillary nodes in the axillary, the cervical nodes in the neck
Lymphatic tissue consist a of lymphocytes and other cells that can form dense aggregation of tissue called
Lymphatic nodules
Spaces between the lymphatic tissue that contain macrophages on a network of fibers
Lymphatic sinuses
Capsule
Tissue that surrounds the lymph node
