Anatomy Of Earthworm Digestive System

The buccal cavity is made up of 2 segments that is thin walled and shaped like a pear. Alimentary canal is long and straightextending from mouth to anus.

Earthworms

3 rd 4 th segment.

Anatomy of earthworm digestive system. Food such as soil enters the earthworms mouth where it is swallowed by the pharynx. The ventral conducting system of pharynx serves as a passage for the ingested materials. Digestive system of earthworm.

The prostomium or mouth of an earthworm is made up of strong lips. Find the mouth opening the first part after the mouth is the pharynx you will see stringy things attached to either side of the pharynx pharyngeal muscles. Digestive system of the earthworm consists of alimentary canal mouth buccal cavity pharynx oesophagus gizzard stomach intestine and anus and digestive glands pharyngeal gland gastric epithelium intestinal epithelium and intestinal caecae.

Blood vascular system of earthworm is of closed type. The digestive system consists of the pharynx the esophagus the crop the intestine and the gizzard. It consists of following parts.

2 nd 3 rd segment or middle of 3 rd segment. The gut of the earthworm is a straight tube which extends from the worms mouth to its anus. Gizzard acts as a grinder for soil particles along with food.

The earthworms digestive system is one of the most important system in the worm. The alimentary canal comprises of mouth buccal cavity pharynx oesophagus gizzard stomach intestine and anus. There are no jaws and teeth and the earthworm sucks in the soil containing food with the muscular pharynx.

Like the buccal chamber the pharyngeal wall remains to connect with the body by a thick mass of muscular strands. Earthworms are both ammonotelic and ureotelic. The alimentary canal consists of a mouth buccal cavity generally running through the first one or two segments of the earthworm pharynx running generally about four segments in length oesophagus crop gizzard usually and intestine.

The role of typhlosole is to increase the surface area of absorption. Proteolytic enzymes for digestion of proteins. Summary points on earthworm digestive and excretory system.

Digestive system of earthworm consists of alimentary canal and glands along with physiology of digestion. The digestive system starts at the mouth. Then the soil passes through the esophagus which has calciferous glands that release calcium carbonate to rid the earthworms body of excess calcium.

It is differentiated into an alimentary canal and associated glands which are embedded in the wall of the alimentary canal itself. Contraction and relaxation of muscular strands serve to compress or dilate the pharyngeal lumen. Pharynx lies in the 4 th 5 th and 6 th segments.

You will trace the organs all the way to the anus and identify each on the worm.

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