AP Mod11 Ch17 Quiz

functions of lymphatic system

• removal of excess fluid from body tissues

• absorption of fatty acids and subsequent transport of fat, chyle, to the circulatory system

• production and activation of immune cells (such as lymphocytes, monocytes, and antibody producing cells called plasma cells

lymphatic system consists of several structures and organs that contain lymphatic tissue, bone marrow, and a fluid called lymph that flows within lymphatic vessels (often drawn in green). doesn't have to be an organ, just have a lymph function

• true

• false

lymphatic vessels begin as lymphatic capillaries (microscopic), which are closed on one end. lymphatic vessels (lymphatics) **return interstitial fluid and leaked plasma proteins back to blood. ~3L/day of excess fluid collected. once interstitial fluid enters lymphatics, called lymph

• lymphatic capillaries are located between cells of many tissues

• lymphatic capillaries merge to form lymphatic vessels, which have thin walls and many valves

from lymphatic vessels, lymph passes through lymph nodes and then into lymph ___. lymph ___ include the lumbar, intestinal, bronchomediastinal, subclavian, and jugular trunks. lymph trunks then merge to form either the thoracic __ or the right lymphatic __

• duct, duct, trunks, trunks

• trunks, trunks, duct, duct

two major ducts in thoracic cavity

• thoracic duct

• right lymph duct

drains stuff in - rest of the body: left side face and head, thoracic cavity, left upper extremity, abdominal cavity, both lower extremities. bigger and drains larger area. drain into left subclavian vein and down into superior vena cava, brachiocephalic vein, etc

• thoracic duct

• right lymph duct

drains stuff in-right side of face/head, right side of thoracic cavity, right upper extremity. drain into right subclavian vein just before it empties into brachiocephalic and superior vena cava

• thoracic duct

• right lymph duct

interstitial fluid --> lymph capillaries --> lymph vessels --> lymph trunks --> lymph ducts --> subclavian veins

• formation and flow of lymph

• lymph transport

lymph propelled by:

milking action of skeletal muscle, pressure changes in thorax during breathing, valves to prevent backflow, pulsations of nearby arteries, contractions of smooth muscle in walls of lymphatics. similar to venous return-against gravity. follows same rules/mechanisms

• formation and flow of lymph

• lymph transport

primary lymphatic organs are organs related to immune system where immune cells become immunocompetent. after cells have differentiated in bone marrow, go to thymus for further education and become immunocompetent

• red bone marrow

• thymus