what happens during egestion
For grade 7
Answers
Answer:
Excess water is absorbed back into the body in the large intestine. What is left then is undigested food. This is stored in the rectum, the lower part of the large intestine, until we are ready to go to the toilet. It then comes out of the rectum through the anus as faeces. This process is called egestion. Take care not to confuse egestion with excretion.
The digestive system contains many bacteria and about half of the dry weight of faeces consists of bacteria. Bacteria in the digestive system are important. For example, they:
can digest some substances that humans cannot digest, such as certain carbohydrates
reduce the chance of harmful bacteria multiplying and causing disease
produce some vitamins that humans need, such as vitamins B and K
Answer:
Egestion in animals
In humans and other higher forms of animals, the egestion process entails waves of muscular contractions of the colonic walls, moving the fecal matter towards the rectum. The fecal matter is temporarily stored in the rectum ampulla. As the fecal matter accumulates, the rectal walls expand.
Explanation: