Unit 13 digestion and respiration Flashcards
what is absorption?
taking the digested food into the blood and then into the cells
what is elimination?
removal of undigested materials from the body
what is peristalsis?
Wave-like contractions of the muscles in the digestive system
what is the epiglottis?
a flap of cartilage that covers the opening to the respiratory tract as swallowing occurs, preventing food from entering the trachea or lungs
what is pepsin?
enzyme that begins chemical breakdown of proteins
where is the digestion completed?
in the small intestine
what is the first part of the small intestine?
the duodenum
where does the duodenum get its chemicals?
gets chemicals, enzymes, and bile from the pancreas, liver, and gallbladder.
what is digestion?
the mechanical and chemical break down of food
what is the last part of the digestive system?
the rectum
what is the appendix?
a vestigial structure, has no function in modern humans
what are the 3 sections of the large intestine?
ascending, transverse, and descending
what is the job of the large intestine & what is it also known as?
to absorb water and leave solid material. aka colon
how long does the material stay in the large intestine?
18-24 hours
