Worms Anatomy
To understand a worm anatomy and physical functions it is also a good idea to understand its purpose and function in nature. A worms body is made up of many segments called annuli.
A worm has three major duties in life eat poop and mate.
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Worms anatomy. It has a double transport system made of coelomic fluid that moves within the fluid filled coelom and a simple closed circulatory system. It has a central and a peripheral nervous system. Its central nervous system consists of two ganglia above the m.
Worms have no lungs so they do not breathe like a human being or like many other. Earthworms use the prostomium to see their environment as earthworms have no eyes ears nose or hands. An earthworm is a tubular segmented worm of the phylum annelida.
I said head to toe but i dont really have a head like yours. It contains sandy grit from the soil to pulverize food into small particles including leaf litter mulch and soil organics. Please remember that it is really different from the tail end called the posterior.
They occur worldwide and are commonly found in soil eating live and dead organic matter. Anatomy of an earthworm. The first segment of the earthworm the peristomium see figure 1 contains the mouth.
The length of a worms body has muscles which contract and relax which enables the worm to move along a surface. Not necessarily in that order the worm has a pointed head and a slightly rounded body. The intestine is a tube going straight back to the anus taking up almost two thirds of the length of the worm.
Next is the gizzard the food grinding chamber. External anatomy of earthworm. Every segment of the body excepting the clitellar and the first and last.
But i do have a head end the fancy word is anterior. It truly plays a huge role in the creation and design of our ecosystem. An earthworms digestive system runs the length of its body.
It secretes the material for producing cocoons. Worm anatomy physiology. There is a small tongue like lobe just above the mouth called the prostomium see figure 1.
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. The annuli are covered in tiny hairs called setae which help the worms movement. It respirates through its skin.
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