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Biology
B2 : Organisation
Organisation A
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Created by
Jainisha Karadia
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Cards (11)
Cells
Smallest
unit of life
Organ
Group
of
tissues persorming similar functions
Organ systems: Made up from
several
organs
that work together to form and function
organisms
Digestion in gullet / oesohphagus:
Muscular tube
peristalis
- wave of
muscle contractions
forcing food down to
stomach
Digestion in stomach:
Sphinter
allows food to
enter
and
squeezes shut
to
stop
food /
fluid
moving back up
stomach
muscles churn
and mix food with
acids
and
enzymes
acidic environment
needed for
digestion
Liver (digestion): Produces
bile
- helps
digestion
of
fat
- stored in
gall bladder
Digestion in
small
intestine:
Digested food molecules
are
absorbed
through
intestine wall
and into
bloodstream
to be carried around
body
inside
wall
of
small intestine thin
with
large surface area
(
villi
) -
quick
and
efficient absorption
Enzymes: A
biological catalyst
protein
with unique and
specific
shape
Carbohydrate digestion: E.g. cereal, potato
enzyme :
amylase
Made in :
small intestine
,
pancreas
Product :
glucose
Reaction occurs in :
mouth
,
small intestine
Fats and oils digestion: E.g.
margarine
enzyme :
lipase
Made in :
small intestine
,
pancreas
Product :
fatty acids
,
glycerol
Digestion in mouth:
Mechanical
and chemical digestion
mechanical -
teeth
increasing
surface
area
enzyme
in saliva -
amylase
- breaks down
starch