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

n

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