Breathing
About 23,000.^111
Windpipe
Air from your mouth
and nose enters your
windpipe, which
goes down your
throat into your
chest. Then it splits
into two passages –
one for each lung.Air sacs
Your lungs are full of tunnels
ending in tiny air sacs called
alveoli. Here, oxygen from the
air passes into your blood. Your
blood carries oxygen around
every part of your body.A helping hand
Some newborn babies
have trouble breathing.
They are put into an
enclosed cradle called
an incubator. Extra
oxygen is pumped into
the incubator for them.The view from the
bottom of your
windpipe.
The alveoli are
surrounded by tiny
blood capillaries to
take the oxygen round
the body.Insects such as caterpillars
breathe through body
openings called spiracles.Frogs can absorb oxygen
through their skin – even
underwater.Many sea creatures such as
sharks breathe through gills.No lungs
Not every animal has
lungs. There are other
ways animals breathe.