BIOLOGY-animal survival-mechanical breakdown of food
teeth
tooth decay
flurides in toothpaste strengthen the enamel and make it more resistant to acid
bacteria change your food to acid, which attacks the enamel
caused by bacteria in your mouth mixing with saliva to from plaque
types of teeth
herbivores
molar-for chewing and grinding
premolar-used for chewing and grinding
gap-no canines present
incisor-for biting against horny/hard pad and shearing grass at its roots
horny/hard pad
carnivores
molar-for crushing bones
carnassial-for shearing flesh
premolar-for crushing bones
canine-for holding and piercing prey
incisor-for biting
omnivores
molars-grind and chew food
premolars-also chew up food
canines-to tear food
incisor-to bite food
how food is broken down
2 steps
chemical breakdown by enzymes eg-starch(insoluble) >enzymes> glucose(soluble)
mechanical breakdown by teeth
food is broken down into smaller soluble particles that can pass from the small intestine into the bloodstream
