6. The Digestive Journey
Digestion begins in your mouth with action of your teeth
and tongue (mechanical digestion) and your salivary
glands (chemical digestion).
The salivary glands produce enzymes that are mixed with
the food, breaking down the starches. Peristalsis is the
muscular action that moves the food through the
esophagus and into your stomach after you swallow.
8. The Functions of Your Respiratory System
Your respiratory system moves oxygen from the outside
environment into your body. It also removes carbon dioxide and
water from your body (this image shows all the tiny bronchioles
that carry air into your alveoli for gas exchange).
11. The Respiratory and Circulatory
Systems: Working Together.
Working
together the
respiratory and
circulatory
systems form
the cario-
pulmonary
system, which is
an integral
connection
between the
heart and lungs.
13. Your skin covers your body and
prevents the loss of water. It
protects the body from injury
and infection. The skin also
helps to regulate body
temperature, eliminate wastes,
gather information about the
environment, and produce
vitamin D. The skin is
organized into two main layers,
the epidermis and the dermis.
14. Immune System
Your Immune system
protects you from
foreign invaders.
Special cells react to
each kind of pathogen
with a defense
targeted specifically at
that pathogen.
http://www.nobel.se/medicine/laureates/1996/illpres/introduction.html
23. Nervous System
Your nervous system receives information
about what is happening both inside and
outside your body. It also directs the way in
which your body responds to this
information.
26. Your Senses Are Your Nervous System’s
Bridge to the Outside World
Sight, Taste, Touch, Hearing, Smell
Web Sources and Resources: Usborne Science Encyclopedia pgs. 370-375 and Quicklink Images
