SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pharynx
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crop
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clittelum
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gizzard
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Detailed explanation-1: -So the correct answer is ‘Macronephridia’.
Detailed explanation-2: -The digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard. Food such as soil enters the earthworm’s mouth where it is swallowed by the pharynx.
Detailed explanation-3: -The segments 14-16 are covered by a prominent dark band of glandular tissue called clitellum.
Detailed explanation-4: -The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which eggs are stored. It is located near the anterior end of the body, between the fourteenth and seventeenth segments.
Detailed explanation-5: -Anterior. The ‘head’ or front of the earthworm is called its anterior. Prostomium and mouth. The first segment on the earthworm’s anterior holds the prostomium and mouth. Skin. Earthworms breathe and lose moisture through the skin. Segment. The body is divided into segments. Setae. Clitellum. Dorsal. Ventral. More items •12-Jun-2012