Adaptations of ileum and villus in the absorption of digested food

Adaptations of ileum and villus in the absorption of digested food

How is the long ileum adapted to absorb nutrients?

Internal layer is folded and covered by tiny projections called villi

What are the five adaptations of the villus to absorb nutrients?

1. Epithelial layer

2. Goblet cells

3. Network of blood capillaries

4. Lacteal

5. Intestinal glands

Epithelial layer

One cell thick to accelerate nutrient absorption

Goblet cells

Secrete mucus to aid digestion

Network of blood capillaries

Transport digestive products to the whole body

Lacteal

Carries droplets of fatty acids and glycerol

Intestinal glands

Secrete intestinal juices

Microvillus

• On the surface of villus epithelium

• Provides a large surface area to increase the rate of nutrient absorption