All animals __________.
respire
All animals _______ oxygen (O2) and _______ carbon dioxide (C02)
take in - release
Humans use _________ to take oxygen from the environment.
lungs
Fish use _____ to get oxygen from the water.
gills
Insects have ________ system to respire.
tracheal
____________ get oxygen through body surface.
worms
Which animals in the ocean have lungs?
Dolphins and whales
What's this?
Inhale
What's this?
Exhale
What's this?
Diaphragm
What are these?
Ribs
Humans inhale air through _________ or _________.
nose or mouth
When we exhale air, our diaphragms ________.
move up
