Transcript Circulatory system.pps

The Circulatory System
Created by:
Katlin &
Morgan
Sponges
Sponges do not have a
true circulatory system.
A water flow system
performs this function
for it instead.
Earthworms
The earthworm has two main blood vessels –
the The
dorsal
and has
ventral,
which carry blood
worm
the simplest
toward
either
the head or
the tail. The dorsal
closed
circulatory
system.
vessel moves
the blood
the
This means
thattowards
the blood
is head and the
ventralconfined
vessel moves
the blood
to the tail. Near
to vessels,
arteries,
the head
thereetc.
are five secondary vessels that
organs,
serve as the worms “hearts” because they
connect the dorsal and ventral vessels.
Frogs
The either
frog has
closed
circulatory
system
with
Before
of athose
steps
occur, the
oxygen
richa and
three poor
chamber
center
of the
oxygen
bloodheart
mixbeing
in thethe
heart
before
being
system.again.
BloodThe
withfrog’s
oxygen
in it goessystem
into the
separated
circulatory
is very
heartto
and
throughexcept
the heart’s
various
processes,
similar
humans,
they have
a three
chamber
oxygen
laden
blood
forcedof
toblood
all of to
theoccur.
cells
heart
which
allows
theismixing
needinghave
its nutrients.
The oxygen
poor blood
Humans
a four chamber
heart which
does not
leaves
allow
this.the heart in a series of arteries which lead
it to the lungs to be provided with oxygen.
Humans
Humans have a closed circulatory system which
uses blood to transport nutrients, wastes, carbon
dioxide, oxygen and hormones. The human heart
uses a two pump system. One of the pumps is used
to send the oxygen poor blood to the lungs and the
other pump is used to send oxygen rich blood
throughout the body. A system of blood vessels
sends the blood to all the parts of the body. Veins
carry oxygen poor blood towards the heart and
arteries carry oxygen rich blood around the body.
The End!