Worms Anatomy

The first segment of the earthworm the peristomium see figure 1 contains the mouth. The skin of segments fourteenth fifteenth and sixteenth is swollen and pale in mature worms to form a saddle shaped structure called clitellum or cingulum.

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It contains sandy grit from the soil to pulverize food into small particles including leaf litter mulch and soil organics.

Worms anatomy. An earthworm is a tubular segmented worm of the phylum annelida. External anatomy of earthworm. But i do have a head end the fancy word is anterior.

I said head to toe but i dont really have a head like yours. The annuli are covered in tiny hairs called setae which help the worms movement. A worm has three major duties in life eat poop and mate.

Next is the gizzard the food grinding chamber. Anatomy of an earthworm. Earthworms use the prostomium to see their environment as earthworms have no eyes ears nose or hands.

Worms have no lungs so they do not breathe like a human being or like many other. It truly plays a huge role in the creation and design of our ecosystem. The intestine is a tube going straight back to the anus taking up almost two thirds of the length of the worm.

Its central nervous system consists of two ganglia above the m. It respirates through its skin. An earthworms digestive system runs the length of its body.

It has a central and a peripheral nervous system. It has a double transport system made of coelomic fluid that moves within the fluid filled coelom and a simple closed circulatory system. Not necessarily in that order the worm has a pointed head and a slightly rounded body.

To understand a worm anatomy and physical functions it is also a good idea to understand its purpose and function in nature. Every segment of the body excepting the clitellar and the first and last. A worms body is made up of many segments called annuli.

There is a small tongue like lobe just above the mouth called the prostomium see figure 1. Worm anatomy physiology. It secretes the material for producing cocoons.

They occur worldwide and are commonly found in soil eating live and dead organic matter. The length of a worms body has muscles which contract and relax which enables the worm to move along a surface. Please remember that it is really different from the tail end called the posterior.

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