ATI Science- Lymphatic/Immune & Digestive System Flashcards
Functions of lymphatic system
return excess fluids to bloodstream
Lymphoid organs
lymph nodes, spleen, appendix, adenoids, thymus, tonsils, small tissues on small intestines
Lymph nodes contain
lymphocytes and plasma cells
filters old RBCs , macrophages, unwanted materials out of the blood and helps fight infections
spleen; located in ULQ
secretes hormones and major site of lymphocyte production
thymus
How does the digestive system function?
Movement, secretion, digestion, and absorption
Digestion process in human body
Mouth>Pharynx> Esophagus > Stomach > Small Intestine> Large Intestine > Rectum > Anus
Functions of stomach
mix/store food; dissolve food; load food to small intestine
Protein digestion begins where?
Stomach
Saliva contains _____ that breakdown starch in process of digestion
enzymes
Absorption begins where?
Small intestine
Passage of nutrients through plasma membranes into the blood/ lymph and supplied to the rest of body
Absorption
Chemical breakdown of nutrients into smaller units
Digestion
Small intestines aka _____ large intestine aka ________
“the dums”(duodenum, jejunum and illeum) and “the colons”
organ that makes and secretes bile and process/ purify blood containing newly absorbed nutrients that are coming from the small intestine.
liver; (located in URQ)
organ that secretes digestive enzymes that break down sugars, fats, and starches
pancreas
exocrine tissue function vs endocrine tissue function of pancreas
secretes digestive enzymes vs secretes hormones (insulin) into bloodstream
acidic fluid w/ partially digested food that passes from stomach to small intestine
chyme
concentrates, mixes and stores waste material
large intestine/colon
Process of how food moves through GI tract
Peristalsis
Immune system includes
lymphatic system, red bone marrow and WBCs
filters pathogens/ foreign substances
lymph nodes
located in pharynx, protects against pathogens entering body via mouth/throat- made up of lymphatic tissue
tonsils
where immature T cells formed in bone marrow mature; made up of lymphatic tissue
thymus