EVERYDAY SCIENCE

Detailed explanation-1: -It contains villi. There is a short conical projection on the 26th segment, which is known as intestinal caeca. Intestinal caeca extend upwards till 23rd segment and secrete amylase enzyme. Amylase helps in the digestion of carbohydrates.

Detailed explanation-2: -The digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard. Food such as soil enters the earthworm’s mouth where it is swallowed by the pharynx.

Detailed explanation-3: -What are some similarities between a human digestive system and the earthworm’s digestive system? They both have two openings (mouth and anus); and they also have an esophagus, pharynx.

Detailed explanation-4: -The intestine extends over two-thirds of the worm’s body length. In the intestine, food is broken down into usable chemicals which are absorbed into the bloodstream. Leftover soil particles and undigested organic matter pass out of the worm through the rectum and anus in the form of castings, or worm poop.