10-Circ&immun-42+43-S08

10-Circ&immun-42+43-S08 - 3/3/2008 1 Circulation...

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Unformatted text preview: 3/3/2008 1 Circulation and Immune function Circulation and Immune function Figure 40.9b An example of negative feedback: Control of body temperature (Layer 1) Figure 40.9b An example of negative feedback: Control of body temperature (Layer 2) Furnace of Life: Furnace of Life: Positive feedback: Positive feedback: a system of receptors, control center, and effectors results in a change away from the norm instability! Amplifies systems rare Exp/ child birth - contractions Change is good! Change is good! the only time systems are at perfect equilibrium is when the organism is dead! the environment is always changing so organisms need means to respond so each system has the ability to change in response to external and internal stimuli. Circulation: Circulation: Question: What is the purpose of a circulatory system? 3/3/2008 2 Circulation: Circulation: Question: What components would you need for a circulatory system? Circulation: Circulation: Simple = used by primitive organisms to transport gases, nutrients and waste thru simple Types of circulatory systems: Types of circulatory systems: body Exp/ Cnidarians Figure 42.1 Internal transport in the cnidarian Aurelia Circulation: Circulation: Simple = used by primitive organisms to transport gases, nutrients and waste thru simple Types of circulatory systems: Types of circulatory systems: body. Exp/ Cnidarians Open = used by many invertebrates. Moves hemolymph through sinuses in the body. Exp/ Arthropods, Molluscs Figure 42.2 Open circulatory systems Circulation: Circulation: Simple = used by primitive organisms to transport gases, nutrients and waste thru simple body. Exp/ Cnidarians Open used by many invertebrates Types of circulatory systems: Types of circulatory systems:...
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10-Circ&immun-42+43-S08 - 3/3/2008 1 Circulation...

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