student excretion s08

student excretion s08 - Extreme Cardiovascular Systems:...

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Extreme Cardiovascular Systems: Animals at High Altitudes Challenge: Obtaining sufficient O 2 at low atmospheric pressures http://www.bio.davidson.edu/Courses/anphys/1999/Dickens/llama.htm Solutions: Hemoglobin has high affinity for O2 Large heart and lungs Many red blood cells (RBCs) RBCs have high [hemoglobin]
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Extreme Cardiovascular Systems: Diving Animals Challenge: Making energy with no oxygen intake. Solutions (diving seals): Many RBCs: allow O 2 storage http://upload.wikimedia.org/wikipedia/commons/thumb/6/65/Hawaiian_Monk_Seal,_photo_in_water.jpg/735px-Hawaiian_Monk_Seal,_photo_in_water.jpg ; http://en.wikipedia.org/wiki/Myoglobin Large blood volumes RBCs stored in spleen Muscles contain myoglobin Anaerobic respiration Myoglobin Gliding Solution (diving penguins): Air sacs serve as Swimming motions can squeeze air across lungs
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Iron-deficiency Anemia Why low iron levels? Blood loss Lack of dietary iron Inability to absorb iron Severe cases About 1/5 women of child-bearing age affected Treatments Stop bleeding Change in diet Iron supplements
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Sickle Cell Anemia The sickle cell part: The anemia part:
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student excretion s08 - Extreme Cardiovascular Systems:...

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