i'm pretty suure.. it's digestion.
Well, metabolism is all chemical activity in an organism. usually this is put into four catagories ingestion, digestion, excretion, and respiration. So a red kangaroos matabolism is what nutrients it takes in, breaking substances into simpler substances, getting rid of waste materials, and breathing with its lungs.
The holozoic mode of nutrition is just the taking in of complex organic matter by animals. Hence, organisms undergoing this mode of feeding include humans, birds, whales, sharks, lions, elephants etc.
Ingestion takes place in the mouth.
Excretion is the elimination of waste from the body.
First it goes into the mouth,then it goes to the esophagus that takes the food from the mouth to the stomach,then it goes to the liver that puts in juices in the food,then it goes to the stomach,then it goes to the pancreas that produces several digested juices,then it goes to the small intestine that absorbs digested food,then it goes to the gall bladder that stores digested juices,finally it goes to the large intestine and it eliminates the waste.
The human digestive system takes roughly 72 hours between ingestion and excretion, regardless of the specific food eaten. This is determined by the rate of peristaltic contractions pushing the material along.
The brain is not directly involved in mechanical digestion. It plays a role in initiating the digestive process through signals but does not physically participate in breaking down food.
let me tell all your something i want how digestion takes places.
Digestion first takes place in the mouth, then the stomach, and then in the small intestines.
what is responsible for chemical digestion in earthworms
It can take very long to digest, up to 40 hours. But on liquidy and soft food such as fruits, it can take only 2 hours!