Humans inhale oxygen and exhale __________________.
carbon dioxide
True or False: Mammals have sense organs.
True
Which body system helps break down and digest food and liquids?
The digestive system
Which body system absorbs oxygen from the air and expels carbon dioxide?
The respiratory system
The ___________ system moves blood around our bodies.
circulatory
The _______________ system extracts waste substances from the blood and expels them from our bodies.
excretory
Do ears detect sound or taste?
sound
Does the nose detect smell or light?
smell
The _____ is the coloured part in the front of the eye.
iris
Which part of the eye is a black circle?
the pupil
Does the outer, middle or inner ear contain the cochlea?
the inner ear contains the cochlea
The ear has three main parts, what are they?
The outer, middle and inner ear.
______ are two holes at the bottom of the nose.
Nostrils
