Digestive System

Question 1

Identify principle organs of the digestive system?

Answer 1

1. Mouth
2. Salivary Glands
3. Pharynx
4. Oesophagus
5. Liver
6. Stomach
7. Pancreas
8. Small and Large Intestine
9. Anus / Rectum

Question 2

Stages of digestion?

Answer 2

1. Ingestion (food entering the digestive system)
2. Digestion (food being broken down into smaller molecules by peristalsis)
3. Egestion (the release of undigested material)

Question 3

What is peristalsis?

Answer 3

The process of food being moved through the body. The muscles work together to create wave-like motions in the gut wall.

Question 4

What is assimilation?

Answer 4

The movement of digested food molecules into cells of the body where they are used.

Question 5

What is villi?

Answer 5

Villi are tiny finger, shaped structures which increase the surface area.

Question 6

Give three ways the small intestine is adapted for good nutrient absorption?

Answer 6

• Has a thin lining
• Has an abundance of villi which increase the surface area
• Good blood supply.

Question 7

Where is bile produced?

Answer 7

The liver - it is stored in the gall bladder before it is released via the bile duct into the small intestine.