digestive system Flashcards

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1
Q

stages of nutrition

A

ingestion/eating:food is taken in by the body
digestion: the food is broken down
absorption : digested food passes into the bloodstream.
assimilation: using the food in the cells of the body
elimination: getting rid of undigested food.

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2
Q

2 types o digestion

A

physical and chemical

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3
Q

physical digestion

A

taking large pieces of food and breaking them down into smaller pieces happens in the :
mouth (teeth)
stomach(churning)

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4
Q

chemical digestion

A

involves the use of chemicals called enzymes to break down food

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5
Q

what is a enzymes

A

are chemicals that speed up reactions without being used up in the reaction

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6
Q

how do enzymes work

A

enzymes act on a substrate and breaks it down into a product e,g substrate = starch, enzymes = amylase (saliva) . product = maltose (sugar)

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7
Q

where is amylase and enzymes in the body

A

amylase in the mouth
enzymes in the stomach

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8
Q

where does the most chemical digestion happen?

A

small intestine

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9
Q

what breaks down fats ?

A

the bile (made in the liver)

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10
Q

what makes digestive juices (includes enzymes

A

pancreas

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11
Q

what do ur teeth do ?

A

cut tear crush

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12
Q

different types of teeth:

A

incisors
canine
pre-molars
molars

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13
Q

incisors

A

at the front of the mouth
4 upper 4 lower
used for biting and cutting food

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14
Q

canine

A

one at either side of the incisors
2 upper 2 lower
grasp and tear food

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15
Q

pre molar

A

3 at either side of the canine
6 upper and 6 lower
grind and crush food

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16
Q

molars

A

2 at either side of pre molars
4 upper and 4 lower
grind and crush food

17
Q

herbivore

A

only eats plants
very large incisors
large molars and pre molars to chew grass

18
Q

carnivore

A

only eat meats
larg canine teeth
use the teeth to catch and tear their prey

19
Q

omnivore

A

eats plants and meat
need all different kind of teeth