mechanical digestion

Question 1

where or how does mechanical digestion occur in the digestive system

Answer 1

1. mouth
2. stomach
3. peristalsis
4. segmentation

Question 2

what is mechanical digestion

Answer 2

large pieces of food are “smashed” into smaller pieces of food. It is a physical form of digestion.

Question 3

how does mechanical digestion occur at the mouth

Answer 3

The teeth in the mouth each have specific functions. The premolars and molars are used to crush and grind food into smaller pieces for the mouth to swallow them.

Question 4

how does mechanical digestion occur in the stomach

Answer 4

Mechanical digestion in the stomach is achieved by waves of muscular contraction that move along the stomach wall. The stomach’s oblique, circular and longitudinal muscles enable the stomach to contract in a variety of ways to churn food and mix it with stomach juices. The stomach breaks down food into a soup-like consistency called chyme

Question 5

how does peristalsis occur

Answer 5

Are the rhythmical wave-like contractions of the circular muscle of the oesophagus that pushes food down it forming constrictions behind it

Question 6

how does segmentation occur

Answer 6

Segmentation is the process of the small intestine forming segments by contracting both ends. A circular muscle in the segment contract and relax repeatedly to break down food. These contractions then open up and the broken down food moves out of the segment.