CIRCULATION

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CIRCULATION
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THE PROBLEM

• INTERNAL TRANSPORT
• Gases
• Nutrients, Wastes
• Hormones
• Rate of Diffusion
• Q DA (C1 - C2)
• X

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THE SOLUTIONPATTERNS OF CIRCULATION

• No Specific Structures
• Open Circulation
• Closed Circulation

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THE GAME PLAN.... REDUCE DISTANCE FOR
DIFFUSION MAXIMIZE SURFACE AREA Q DA
(C1-C2) X
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How to circulate substances?
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No Specialized Circulatory System Porifera
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Porifera
Life style Distance for diffusion Area for
diffusion Habitat
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No Specialized Circulatory System Cnidaria
Gastrovascular Cavity
Life style Distance for diffusion Area for
diffusion Habitat
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No Specialized Circulatory System Platyhelmint
hes
Gastrovascular Cavity
Surface area Distance for diffusion Life
Style Habitat
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OPEN CIRCULATORY SYSTEM Mollusca
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OPEN CIRCULATORY SYSTEM Arthropoda
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OPEN CIRCULATORY SYSTEM CHORDATA TUNICATE
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CLOSED SYSTEM Annelida Squid,
Octopus Vertebrates
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Mammalian Circulation

• A main propulsive organ which forces blood around
  the body.
• Arterial system which acts to distribute blood
  and to maintain pressure.
• Capillaries in which transfer between blood and
  tissues occurs.
• Venous system which acts as a blood volume
  reservoir and as a way to return blood to heart.

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