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d) Stomach – muscular, expandable sac
1) Sphincters = _______________________________________
_________________________________________________
2) Gastric Glands – ____________ = combination of __________
________ and ________________
3) Chemical digestion – ___________ breaks down __________
into ___________________
HCl acid also helps to _______________________________
4) Mechanical Digestion –
stomach muscles ________,
contracts, and churns the
chyme (food mass)