Option H3: Absorption of digested foods

H.3.1 Draw and label a diagram showing a transverse section of the ileum as seen under a light microscope

H.3.2 Explain the structural features of a epithelial cell of a villus as seen in electron micrographs, including microvilli, mitochondria, pinocytotic vesicles and tight junction

H.3.3 Explain the mechanism used by the ileum to absorb and transport food, including facilitated diffusion, active transport and endocytosis

H.3.4 List the materials that are not absorbed and are egested