Transcript Section 3.2 The Circulatory System

Section 3.2
The Circulatory System
What is its function?
To carry blood throughout the body
What is in the blood:
oxygen
carbon dioxide
glucose
hormones
antibodies
Types of Systems
Open Systems
blood is pumped into
body cavities and cells
exchange blood
products via diffusion
very inefficient
snails, sponges, insects
blood = hemolymph
Type of Systems
Closed System
very efficient
blood is transported to
every cell in the
organisms body via
blood vessels
Organs of a Closed
System
Arteries - carry blood
away from the heart
rigid muscular walls
similar to a garden hose
Other Vessels
Veins
carry blood back to the
heart.
stretchy thin walls
valves
The Pump
The heart is actually a
double pump for it
pumps to two locations
the lungs
the body
The route of blood
The heart pumps
blood to both the lungs
and the body
simultaneously
Watch it pump!
Online Version
Cool Links
Lets see if we can
make Jamie flinch!
Diseases/Operations