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Module 8 Intro

1. Module 8 Intro

1.28. Page 4

Lesson 4

Module 8—Circulation, Immunity, and Excretion

Reflect and Connect

 

Try This

 

TR 2. Capillary Action in Different Systems

 

Describe what is happening, in terms of exchange of matter, in each of the following systems:

  1. motor
  2. respiratory
  3. digestive (excluding the example of the large intestine)
  4. excretory

Explain how the concentration gradient and pressures would move matter specific to each system in and out of the circulatory system.

 

For example, capillaries in the large intestine would absorb water and deposit nutrients. The amount of water in cells and interstitial space surrounding large intestine cells would be high in comparison to the capillary, since the job of the large intestine is to absorb water.

 

The difference between hydrostatic pressure and osmotic pressure would cause water to enter the capillary to be distributed to other parts of the body requiring water. Nutrients and oxygen would diffuse out of the capillary. The pressure difference from the arteriole to the venous end of the capillary ensures that blood flows in one direction.

 

Record your responses in your course folder as a review of the role of the capillaries in matter exchange.

 

Module 8: Lesson 4 Assignment

 

Remember to submit the Assignment answers to your teacher as part of your Module 8: Lesson 4 Assignment.