Earthworm Observation

Observations:
During the dissection, there might have been a few things observed. Two main observations that may have been noted was the change of colour and ring like segments.

It may have been noted that the back and front side of the earthworm consists of two different colours. The back side of the earthworm is referred to as the dorsal side and the front side of the earthworm is referred to as the ventral side. A distinct observation is the fact that the ventral surface of the earthworm is a lighter colour than the dorsal side.

During the dissection, a small ring like structure may have been observed. This ring like structures, known as segments, are found around the body of the earthworms. Each earthworm are made up of many segments but are sometimes hard to notice. These segments are filled with liquid to help the earthworms move around.

When feeling the

The mouth is the first part of the digestive system that takes in the food leading it to the pharynx. The pharynx is a tube-like structure that pumps the food and soil into the esophagus. There, the calciferous glands which is found in the esophagus, releases calcium carbonate. This helps get rid of any excess calcium in the earthworm’s body. Similar to the pharynx, the esophagus is a tube like structure that leads the food to the crop. The crop is a soft sac-like structure that stores the food temporary until the food gets grinded by the gizzard. A gizzard is a hard sac-like structure that grinds food into smaller molecules such as stones and pieces of dirt. Once the food is grinded completely, the food heads to the intestines where it consists of gland cells which releases fluids to aid in the digestive process. All the nutrients and soil are absorbed by the blood vessels found in the intestinal wall. Any excess nutrients and soil from the intestine leaves from the anus (Scienceprojectideasforkids,