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Digestive System

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by

Gertjan Goossens

on 14 October 2014

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Transcript of Digestive System

WHAT IS
energy
in food?
nutrients
peristalsis
Digestive System
Body Mass Index
digestive system
6 types of nutrients
teeth
mouth
small intestines
Large intestine
First part of the large intestine is
the caecum
carbo hydrates
proteins
fats
water
minerals
vitamins
proteins
carbo hydrates
fats
water
vitamins
minerals
for growth
repair
no storage
fuel
growth
storage (as fats)
fuel
growth
storage
growth
transport
for growth
repair
protection
for growth
repair
protection
How much energy do you need?
depends on:
gender
age
body size
sports
bmi =
mass - kg
(height) - m
2
correct weight or not .....?
Some nutrients are absorbed
directly:
glucose
water
minerals
vitamins
What is digestion?
Break down of nutrients
in smaller parts, but how?
large intestine
is a series of wave like contractions that moves the food through the digestive tract
incisor
molar
canine
root
crown
2 1 2
2 1 2
2 1 2
2 1 2
dental formula
5 1 2
2 1 5
5 1 2
2 1 5
dental formula adult
right
left
upper
lower
function
enlarge the surface area of the food, so acids and enzymes can work better
starch
glucose
enzymes
salivo contains
teeth: chewing, enlarge surface area
esophagus
pharynx
muscles for mixing food
adds acids - kills bacteria
enzymes
proteins
amino acids
gastric juice
STOMACH
spincter
food
duodenum
small intestines
duodenum
gallbladder
cecum
colon
stomach
liver
liver bile (stored in the gallbladder)
works as emulsifier
fat
duodenum
small intestine functions
absorb nutrients
Functions large intestine:
absorbtion of water
digestion of cellullose (plant material) glucose
absorbtion of glucose into the blood
Second part is the large intestine,
about 1.5 m long
Final part of the digestive tract is the
rectum, where faeces is stored
1
2
3
pancreas
pancreatic
juice
CH
P
enzymes
P=proteins

CH=Carbo
hydrates
enzymes break down nutrients
1
2
2
2
3
what is a nutrient?
why do you need them?
where do they go?
energy
what is energy?
why do you need it?
where does it come from?
sleeping: 1
kcal a minut
e
swimming: 11
kcal a minut
e
walking: 4
kcal a minut
e
canoeing: 13
kcal a minut
e
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