preview

The Similarities Between Earthworm And Crayfish

Decent Essays

In my comparative anatomy class I was able to distinguish the difference and the similarities between a earthworm, crayfish, and a chordate. The earthworm and the crayfish are both divided into parts. The earthworm is divided internally and externally into defined segments. These segments may also be divided as well. The crayfish is divided into two main parts. One of the parts that they are divided into is called the cephalothorax which consists of the head region and the thoracic region. The second part is called the abdomen. The abdomen consists of six clearly divided segments. The chordate is not divided into parts. They all belong to the animal kingdom. The crayfish differs from the earthworm and the chordate because it has a hard exoskeleton that covers its body. …show more content…

They all have different ways of how they taste their food. The crayfish taste its food by two ways which is antennules and the long antennae. The only difference between the two is that the antennules helps with balance, touch, and taste, and the long antennae are organs for touch, taste, and smell. The chrodate taste its food by the pharynx. They are able to do this because the pharynx is consisted of 100 pharyngeal slits that are called "gill slits". These gill slits are what is used to strain food particles out of the water. The earthworm obtains its food by extending its body from surfaces and opening a small tunnel which it makes by "eating" its way through the soil. So basically this is saying that earthworms eat

Get Access