12 Digestive Systems

Objectives

• 1. Compare the digestive strategies of single cells, primitive invertebrates, and higher animals.

  2. Compare the general structure of teeth of herbivores, carnivores, and omnivores.

  3. Describe the digestive activities that occur in the mouth and indicate how food passes from the mouth to the stomach.

  4. Describe the digestive activities of and secretions produced by the stomach.

  5. Describe the digestive and absorptive activities of the small intestine, including its secretions.

  6. Explain the importance of convolutions in the digestive tract; identify the regions that are highly convoluted and the regions that are not convoluted.

  7. Explain the digestive activities associated with the large intestine.

  8. Understand the symbiotic relationships that enhance digestive activities in the vertebrates.

  9. Understand the neural and hormonal regulation of digestion.

  10. Know the two kinds of exocrine cells present in the pancreas and the function(s) of each of their secretions.

  11. Describe the metabolic and digestive activities of the liver.

  12. Explain the importance of regulating food intake.

  13. Understand the importance of essential nutrients including vitamins and amino acids.