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Option H3. H3.1 Draw and label a diagram showing a transverse section of the ileum as seen under a light microscope.

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Presentation on theme: "Option H3. H3.1 Draw and label a diagram showing a transverse section of the ileum as seen under a light microscope."— Presentation transcript:

1 Option H3

2 H3.1 Draw and label a diagram showing a transverse section of the ileum as seen under a light microscope.

3

4 H3.2 Explain the structural features of an epithelial cell of a villus as seen in electron micrographs, including microvilli, mitochondria, pinocytotic vesicles and tight junctions. Epithelial cells are adapted to maximize absorption of digested food molecules in the ileum. Tight junctions provide added control of the movement of molecules.

5 H3.3 Explain the mechanisms used by the ileum to absorb and transport food, including facilitated diffusion, active transport, and endocytosis.

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10 H3.4 List the materials that are not absorbed and are egested.


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