Download Circulatory Diversity

Circulatory Diversity
Amoeba
• Does this
organism have
a circulatory
system?
• Why or why
not?
• How does it
internally
transport
molecules?
Other organisms that don’t have a circulatory system include sponges, jellyfish, and
tapeworms.
Plants
• Xylem are the tubes in
plants that carry water
and minerals upward.
• Phloem are the tubes
in plants that carry
food (sugar)
downward from the
leaves.
• Xylem is more interior
than phloem.
Arthropods and other Invertebrates
• They have an open circulatory system. Arteries
carry blood to organs and bathe organs in blood.
Blood freely moves around inside body cavity.
No capillaries or veins. Blood eventually works its
way back up toward heart to be pumped again.
Closed Circulatory System
• Fish, Amphibians, Reptiles, Birds, and
Mammals all have a Closed Circulatory
System. This is were the blood stays inside
blood vessels such as arteries, capillaries, and
veins.
• The heart keeps blood pumping inside this
closed system.
• Nutrients and Gases leave the system by
diffusing through capillary walls.
Fish
• Heart pumps blood past gills where oxygen is
picked up. Delivers oxygen to body and returns
to heart. Heart only has two chambers.
Pulmonary and Systemic Circulation
• Amphibian, Reptiles, Birds, and Mammals
circulation is broken into two circuits – the
pulmonary circulation and systemic
circulation.
• Pulmonary circulation is when blood leaves
the heart, goes to the lungs, and returns to
the heart.
• Systemic circulation is when blood goes to the
rest of the body and returns to the heart.
Chamber Diversity
• Amphibians have a 3 chambered heart…which
allows them to take in oxygen from lungs and
from their skin. The can absorb oxygen
through their skin when under water.
• Reptiles, Birds, and Mammals have 4
chambered hearts.