click below
click below
Normal Size Small Size show me how
science ch 3
lesson 3
Term | Definition |
---|---|
what are the fonctions of the digestive system | diigestion, absorbtion, and elimination |
digestion | processes by which your body breaks down food intto small nutirient molecles |
absorption | processses by whick nurtient molecules pass through the wall of your digestive system into your blood |
large intestine | eliminates materials that are not absorbed |
what is the role of thhe mouth, esophagus, and stomach | mouth, esophagus, and stomach are organs in which mechanical digestion is completed and chemical digestion begins |
mouth | whe bitting info food chemical and mechanical digestion begin |
slivia | fluid realased byy slaviary glands when eating, |
what does slivia contain | a chemical that can break down starches into suggars aka enzymes |
enzyme | protien that speeds up chemical rreactions in the body |
how are enzymes different | each has a speffic sahpe that enables it to speed up only one reaction |
esophagus | musclar tunal that connects the mouth to the stomach, |
epiglotis | flat of tissue, seals off your windpipe and prevents food from going into the lungs |
mucus | makes food easier to digest, lines the stomach |
peristalsis | wabes of invoulentary muscle contracttions that push food towards the somach |
stomach | mostly mechnical some chemical, pouch in the abdomen |