circulation. the problem internal transport –gases –nutrients, wastes –hormones rate of...
TRANSCRIPT
CIRCULATIONCIRCULATION
THE PROBLEM
• INTERNAL TRANSPORT– Gases– Nutrients, Wastes– Hormones
• Rate of Diffusion– Q = DA (C1 - C2)
X
THE SOLUTION:PATTERNS OF CIRCULATION
THE SOLUTION:PATTERNS OF CIRCULATION
No Specific Structures
Open Circulation
Closed Circulation
THE GAME PLAN....
REDUCE DISTANCE FOR DIFFUSION
MAXIMIZE SURFACE AREA
Q = DA (C1-C2) X
How to circulate substances?
No Specialized Circulatory System
Porifera
Porifera
Life styleDistance for diffusionArea for diffusionHabitat
No Specialized Circulatory SystemCnidaria
Life styleDistance for diffusionArea for diffusionHabitat
Gastrovascular Cavity
No Specialized Circulatory SystemPlatyhelminthes
Gastrovascular Cavity
Surface areaDistance for diffusionLife StyleHabitat
OPEN CIRCULATORY SYSTEM Mollusca
OPEN CIRCULATORY SYSTEMArthropoda
OPEN CIRCULATORY SYSTEMCHORDATA: TUNICATE
CLOSED SYSTEM AnnelidaSquid, OctopusVertebrates
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.
