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ANT 3120: Chapter 22
Anatomy
36
Anatomy
Undergraduate 1
03/08/2013

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Term
functions of lymphatic system
Definition
1) returns water, ions, nutrients, gases, and plasma proteins to blood
2) involved with absorption of fats from digestive tract
3) protects against invasion of foreign substances
Term
lymphatic system consists of
Definition
1) lympathic vessels
2) lymphatic organs
Term
major types of lymphatic vessels (smallest to largest)
Definition
1) lymphatic capillaries
2) collecting vessels
3) lymphatic trunks
4) lymphatic ducts
Term
function of lymphatic capillaries
Definition
collect excess interstitial fluid and return it to the bloodstream
Term
interstitial fluid
Definition
extracellular fluid in the microscopic spaces between tissue cells
Term
lymphatic capillaries (description)
Definition
lymphatic vessels located in the microscopic spaces between tissue cells
Term
examples of other extracellular fluids
Definition
1) CSF
2) synovial fluid
3) fluids of eyes and ears
4) pleural, pericardial, and peritoneal fluids between serous membranes
Term
lymph
Definition
interstitial fluid that enters lymphatic capillaries
Term
major difference between interstitial fluid and lymph
Definition
location
Term
where are lymphatic capillaries located?
Definition
in almost all tissues of the body except CNS, cartilage, epidermis, and cornea)
Term
lacteals
Definition
lymphatic capillaries located in the villi of small intestine
Term
collecting vessels
Definition
larger vessels formed by the merging of lymphatic capillaries
Term
function of collecting vessels
Definition
carry lymph into and out of structures called lymph nodes
Term
lymphatic trunks
Definition
merging of largest collecting vessels exiting the lymph nodes
Term
examples of lymphatic trunks
Definition
1) subclavian trunk
2) lumbar trunk
3) intestinal trunk
4) brochomediastinal trunk
5) jugular trunk
Term
lymphatic ducts
Definition
merging of lymphatic trunks in thoracic duct
Term
types of lymphatic ducts
Definition
1) thoracic duct
2) right lymphatic duct
Term
thoracic duct (description)
Definition
largest lymphatic vessel; main collecting duct of lymphatic system
Term
thoracic duct receives lymph from
Definition
left side of the head, neck, and chest, the left upper extremity, and the entire body below the ribs
Term
thoracic duct empties lymph into
Definition
venous blood at the junction of the left internal jugular vein and left subclavian vein
Term
cisterna chyli
Definition
dilation of the thoracic duct
Term
right lymphatic duct drains lymph from
Definition
upper right side of body
Term
right lymphatic duct empties lymph into
Definition
venous blood at the junction of the right internal jugular vein and right subclavian vein
Term
lymph flows as a result of
Definition
1) milking action of skeletal muscle contractions
2) respiratory movements
3) valves that prevent backflow of lymph
Term
lymphatic organs contain
Definition
lymphatic tissue
Term
lymphatic tissue is composed of
Definition
lymphocytes and macrophages
Term
major lymphatic organs
Definition
1) tonsils
2) lymph nodes
3) spleen
4) thymus gland
Term
types of tonsils
Definition
1) pharyngeal (adenoid)
2) palatine
3) lingual
Term
function of tonsils
Definition
provide protection against bacteria and other foreign substances that can enter the pharynx from the nasal or oral cavities
Term
lymph nodes (description)
Definition
structures located along collecting vessels that filter lymph to remove damaged cells and microorganisms
Term
lymph nodes contain
Definition
macrophages and lymphocytes
Term
what is the largest lymphatic organ?
Definition
spleen
Term
location of spleen
Definition
upper left quadrant between the stomach and diaphragm
Term
functions of spleen
Definition
1) immune responses
2) filters blood
3) RBC production in fetus
Term
location of thymus gland
Definition
between sternum and heart
Term
thymus gland is the site of
Definition
site of T cell maturation
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