D i g e s t i v
S y s t e :
O v e r v i e w
1)F oodtr a v elsfr omthe?-mouth—-->abdominalcavity—-->anus2)Mainfunctionofthedig es tiv es y s t em?-Tobreakdownfoodforabsorptionanddistributionofnutrientstothebody3)Wha tspecifics y s t emc on tr olsthesmoothmusclemo v emen tin v olv edinmechanic aldig es tionandf oodmo v emen t?-Theperipher alnervoussystem=involuntary4)Wha tab sorb snutrien tsinthes t omachandin t es tines?-Bloodvessels5)Wha tisthefunctionofthec ar diacsphinct er?-Preventsfoodreflux6)F ollo wthebasicdig es tiv epr ocessa)Mouth:mechanic aldigestioni)Salivalubricatesfoodii)Starchandlipiddigestionb)food=bolus—>s wallowedc)bolus—->phar ynxd)Epiglottisclosestrachea(windpipe)e)Bolustoesophagusf)Peristalsismovesbolusthroughthegastricsphincterg)Stomachi)mechanic aldigestionofbolus=becomeschymeh)Chymetothesmallintestinei)Chymearrivesattheduodenum(1stptofS.I):chymeisneutralizedbyalkalinebilejuicesii)Chymetoileum(2ndptofS.I):siteofwaterabsorption,lipids,andvitaminB12i)Bloodwithnutrientsgoestothehepaticportalductj)Ammoniabecomesureak)Theremainingdigestivematerialgoestothececum—->lar geintestine/colonl)thelargeintestineabsorbstheremainingwater,salt,andvitaminKm)Remainstogototherectumandouttheanus7)De finethefunctionof:a)Salivaryamylase:digestsstarch
