A&P: Lymphatic System
Terms in this set (30)
microscopic, open-ended tubes located near the surface of the body. Beginning of lymphatic network. Large lumens, thin walls, irregular outline, made of collagen filaments.
Collecting lymphatic vessels
collect tissue fluid and return it to the blood stream, accompany blood vessels.
transport lymph. Thin walls, large lumens.
Afferent lymphatic vessels
Vessels that bring lymph draining from connective tissue into a lymph node en route to the blood.
Efferent lymphatic vessels
transport filtered lymph away from the lymph node.
right lymphatic duct and thoracic duct. Empty into veins of the neck
Right lymphatic duct
Smaller. Returns lymph from the right side of the head and neck, right upper limb, and right side of thorax.
Thoracic lymphatic duct
Collects lymph from the rest of the body and dumps it into the left subclavian vein. Begins as saclike structure called cisterna chyli.
interstitial fluid once it has entered lymphatic vessels. Filled with macrophages and lymphocytes
Natural killer cells, T Lymphocytes, B Lymphocytes, Macrophages, Dendritic Cells, Reticular Cells
Originate in red marrow, mature in thymus.
Cytotoxic: directly attack intruders
Helper: stimulate more lymphatic cells
Regulatory: moderate immune response
Memory: respond to antigens
Cell Mediated Immunity
originate and activate in bone marrow. Antibody Activated Immunity
the constant monitoring of normal tissues by natural killer (NK) cells
Natural Killer cells
attack foreign cells, normal cells infected with viruses, and cancer cells that appear in normal tissues.
swelling due to an abnormal accumulation of lymph fluid within the tissues. Treat by massage or compression
Defense cells are especially concentrated in these organs. These include the thymus, spleen, tonsils, appendix and adenoids.
Bean-shaped filters that cluster along the lymphatic vessels of the body. They function as a cleanser of lymph as wells as a site of T and B cell activation
gland in the thoracic cavity above the heart where T lymphocytes mature. Much larger in children.
an organ that is part of the lymphatic system; it produces lymphocytes, filters the blood, stores blood cells, and destroys old blood cells.
Red pulp of spleen
sinuses filled with erythrocytes
White pulp of spleen
contains lymphocytes that can stimulate an immune response.
Mucosa Associated Lymphatic Tissue (MALT)
lymphatic tissue found in mucous membranes that line passageways open to the outside world; these include the respiratory, gastrointestinal, urinary, and reproductive tracts.
masses of lymphatic tissue in the back of the oropharynx. Guards against infections in the mouth and throat.
depression in an organ where blood vessels and nerves enter and leave.
Aggregated lymphoid nodules
clusters of lymphoid follicles in ileum (distal part) of small intestine
malignant tumor of lymph nodes and lymph tissue.
spaces between cells.
mass of lymphatic tissue in the nasopharynx. Guards against infections in the sinus.
A small, fingerlike extension of the vertebrate cecum; contains a mass of white blood cells that contribute to immunity. Guards against infection in the large intenstine particularly from uncooked meat.
lymphatic system functions
a network of tissues and organs that help rid the body of toxins, waste, pathogens, and other unwanted materials. The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.
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