Unit 12- Lymphatic & Digestive system Flashcards
Lymph System consists of?
Thymus, tonsils, spleen, lymph nodes and lymphatic vessels
Thoracic duct
larger and longest of lymphatic vessel. superiorly along the left side
cisterna chyli
dilated sac of the thoracic duct
right lymphatic duct
receives lymph from the right jugular. Smaller and shorter than the thoracic duct
lymph nodes
encapsulated collections of lymphatic tissue.
indicators of infection
Tonsils
group of developing lymphocytes
palatine tonsils
tonsils that can be easily observed with a mirror at the back of thermal cavity
pharyngeal tonsils (adenoids)
embedded in the mucosa of the superoposteriar part of the nasal part of the pharynx (throat)
lingual tonsils
tonsils are embedded in the root of the tongue
Spleen
large lymphatic organ
-positioned left superior quadrant of the abdomen between the stomach and diaphragm.
splenic hilum
where vessels, nerves, etc. enter and leave the spleen.
Thymus
lymphoid organ- located near the base of the heart. subdivided into left and right lobes.
Digestive system and functions
digestive system: oral cavity, gullet, pharynx, esophagus, stomach, small intestine, large intestine.
functions: nutrient intake, solid waste elimination
mucous membrane
deepest portion of the gut wall. composed of 3 layers
epithelial layer
deepest layer of the mucous membrane
lamina propia of the mocosa
composed of connective tissue, support layer between the epithelium and smooth muscle layer
muscular layer of the mucosa
layer of smooth muscle tissue superficial to the lamina propria
submucosa
layer of areolar tissue
muscular coat
layer of smooth muscle tissue
- circular layer: inner
- longitudinal layer: outer
- oblique fibers:present deep to the circular layer
serous membrane/ coat
surrounds digestive organs and the parietal peritoneum
tunica adventitia
layer of connective tissue associated with the surface of the digestive canal
oral cavity
initial part of the alimentary canal
oral vestibule
portion of the oral cavity located outside the teeth and gums.