This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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You're on a roll — 4. The figure below represents a structure obtained from the ileum of a mammal. a) Give the identity of the structure. The structure is a villus* (plural: villi). b) What is the importance of the structure named in (a) above? The villus increases the surface area for absorption* of digested food nutrients in the small intestine. c) Name the parts labeled A, B and D. A: Lacteal* B: Arteriole* (part of the capillary network supplied by an artery) D: Vein* (collects blood from the venule) d) i) Name the juice secreted by the part labeled C. C represents the intestinal gland (crypt of Lieberkühn). The juice secreted is intestinal juice* (or succus entericus). d) ii) List two enzymes present in the juice named in d (i) above. Two enzymes present are: Maltase* Peptidase* (or Erepsin) (Other possible answers include sucrase, lactase, lipase) SECTION A (40 marks) 1. The diagram below represents the digestive system of man and the associated organs a) Identify structure labeled C. C: Liver* Keep up the great work! What's next?