Revision- organ systems
Year 9 Biology
Homework
Aer
ob
ic a
nd
an
aero
bic
re
spir
atio
n
Bre
ath
ing
and
ven
tila
tio
Dig
esti
on
sys
tem
Villi
• Line the intestines
• Increase surface area to allow for increased absorption
Enzy
mes
Biological catalyst
Amylase- carbohydrates➔ glucoseProtease- Protein ➔ amino acidsLipase- Lipids➔ fatty acids and glycerols
Cir
cula
tory
syst
em
Exam q
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