CAIE IGCSE Biology 7.5.5 Capillaries & Lacteals in Villi

Practise using villus diagrams to separate nutrient transport routes: glucose and amino acids enter blood capillaries, while fat products enter lacteals.

Exam points

state that glucose and amino acids enter villus capillaries and travel in blood plasma
state that fatty acids, glycerol or lipids enter lacteals and move through lymph
use labelled villus vessels to choose the route from absorption site to liver or lymph

[Maximum number: 2]

Fig. 1.1 shows several villi from the ileum, which is part of the small intestine.

Fig. 1.1 shows a lacteal in the centre of each villus.

Describe the roles of lacteals.

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7.5.5—Roles of capillaries and lacteals question 1