Lymphatic Capillaries, Vessels, and Trunks

Study Guide 11-24

the smallest of the lymphatics, _________ are microscopic, blind-ended tubes that extend deep within tissue interstices. They are responsible for absorption of excess, accumulating interstitial fluid, forming lymph.

lymphatic capillaries

Lymphatic capillaries are composed of a single layer of _________, termed endothelium, which offers greater _______ than blood capillaries

simple squamous epithelium, permeability

the smallest of the lymphatics, _________ are microscopic, blind-ended tubes that extend deep within tissue interstices. They are responsible for absorption of excess, accumulating interstitial fluid, forming lymph.

lymphatic capillaries

Lymphatic capillaries are composed of a single layer of _________, termed endothelium, which offers greater _______ than blood capillaries

simple squamous epithelium, permeability

lacteals

_________ are specialized lymphatic capillaries found in the villi of the small intestinal mucosa

lacteals are responsible for carrying absorbed ______ and ______ from the gastrointestinal mucosa into the lymphatic vessels and ultimately, the venous blood

dietary lipids, lipid-soluble vitamins

______ is lymph formed in the small intestine, drained by the intestinal lymphatic trunk. It has a high fat content, giving it a creamy consistency and a milky-white appearance

chyle

___________ are larger diameter conduits with three-layered walls. They present with many flap-like, _________ (intimal) valves at frequent intervals within their lumens, which promote unidirectional lymph flow

lymphatic vessels, endothelial semilunar

___________ relay lymph toward a lymph node and penetrate its convex surface

afferent lymphatic vessels

___________ drain and convey lymph, antibodies, and activated lymphocytes (T-cells) away from a lymph node, and emerge from a slight depression on the concave side of the node called the ______

efferent lymphatic vessels, hilum

the efferent lymphatic vessels that serve to drain a certain body region or series of organs generally unite to form one of _____ principal ________

nine, lymphatic trunks

the lymphatic trunks present with 3 distinct layers in their walls and intimal valves within their lumens, and they are named corresponding to the _________

regions they drain

the ______ trunks drain lymph from the head and neck; and relay their drainage onward to a corresponding collecting duct

jugular

the ________ trunks drain lymph from each of the upper appendages, and relay their drainage onward to a corresponding collecting duct

subclavian

the ________ trunks drain lymph from the thoracic walls, lungs, and heart of the semithoraces, and relay their drainage onward to a corresponding collecting duct

bronchomediastinal

the _______ trunk drains lymph from the abdominal viscera (stomach, large and small intestines, pancreas, spleen, and liver) and drainage is relayed onward to the cisterna chyli

intestinal

the _______ trunks drain lymph from the lower appendages, abdominopelvic wall, adrenal glands, kidneys, and pelvic viscera. Drainage is relayed onward to the cisterna chyli

lumbar