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20 Cards in this Set

  • Front
  • Back
(kyle) milky fluid; the fat-containing lymph in the lymphatics of the intestine
lymphatic vessel located in each villus of the intestine; serves to absorb fat materials from chyme passing through the small intestine
specialized fluid formed in the tissue spaces that returns excess fluid and protein molecules to the blood via the lymphatic vessels
Lymph Node
performs biological filtration of lymph on its way to the circulatory system
Lymphatic Vessels
system of blind-ended vessels that collect lymph and deliver it to the circulatory system via the thoracic duct and the right lymphatic duct
largest lymphoid organ; filters blood, destroys worn out red blood cells, salvages iron from hemoglobin, and serves as a blood reservoir
endocrine gland located in the mediastinum; vital part of the body's immune system
masses of lymphoid tissue; protect against bacteria; three types: palatine tonsils, located on each side of the throat; pharyngeal tonsils (adenoids), near the posterior opening of the nasal cavity; and lingual tonsils, near the base of the tongue
What is the overall function of the lymphatic system?
1. Maintenance of fluid balance in the internal environment and immunity.
What is the origin of lymph?
Blood and tissue fluid.
Compare lymphatic vessels with blood vessels.
Lymphatic vessels resemble veins in structure with these exceptions: Lymphatics have thinner walls, contain more valves, and contain lymph nodes located at certain intervals along their course. The lymphatic capillary walls contain openings that are larger than those found in blood capillaries. Boundaries between layers are less distinct in the thinner lymphatic vessel walls than in arteries or veins.
Describe the overall structure of a typical lymph node.
Lymph nodes are oval-shaped structures. Each lymph node is enclosed by a fibrous capsule. The lymph node acts as a “biological” filter with internal sinuses and one-way valves in both the afferent and efferent vessels. Fibrous septa, or trabeculae, extend from the covering capsule toward the center of the node. Cortical nodules within the sinuses are separated from each other by connective tissue (trabeculae). Each cortical nodule is composed of packed lymphocytes that surround a less dense area called a germinal center.
Where are lymph nodes usually found?
Most of the lymph nodes occur in groups, or clusters, in certain areas: just in front of the ear, in the floor of the mouth, in the neck along the sternocleidomastoid muscle, just above the bend of the elbow, deep within the underarm and upper chest, and in the groin.
What functions are carried out by lymph nodes?
Defense and hematopoiesis
How do the lymphatic structures of the breast relate to breast cancer?
Cancerous cells often spread to other areas because of the lymphatic drainage of the breast. Lymphatics originate in and drain the skin over the breast. Cancer cells can spread easily through the extensive network of lymphatic vessels associated with the breasts. Also, anastomoses (connections) occur between superficial lymphatics from both breasts across the middle line. Such communication can result in the spread of cancerous cells from one breast to the other.
(or lymphatic fluid) is the clear, watery-appearing fluid found in the lymphatic vessels
Interstitial fluid (IF),
which fills the spaces between the cells,
Activities that result in central movement, or flow, of lymph are called. the flow of lymph may be called lymphokinesis
How is lymph moved around the body?
Research studies have shown that thoracic duct lymph is literally “pumped” into the venous system during the inspiration phase of pulmonary ventilation. Most lymph flow in the body is the result of contracting skeletal muscles
What are the functions of the spleen?
Defense, Hematopoiesis. Red blood cell destruction and platelet destruction, Blood reservoir