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Question
Locomotion in Pheretima is carried out by
Locomotion in Pheretima is carried out by
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Solution
The correct option is C longitudinal and circular muscles
Pheretima or earthworm belongs to the phylum Annelida. They have an organ system level of organisation.
Locomotion in Pheretima is carried out by longitudinal and circular muscles. Longitudinal muscles run lengthwise along the body. The circular muscles encircle the body and help in increasing or decreasing the width of the organism.
Aquatic annelids like Nereis have parapodia or leg appendages which are present in every segment. It helps in swimming in aquatic annelids. But parapodia are absent in Pheretima.
Gizzard and crop are part of the digestive system in annelids and they do not play any role in locomotion.
Nephridia are special excretory organs that help in osmoregulation, which is the maintenance of water content in the body as well as in getting rid of the wastes of the body.
Pheretima or earthworm belongs to the phylum Annelida. They have an organ system level of organisation.
Locomotion in Pheretima is carried out by longitudinal and circular muscles. Longitudinal muscles run lengthwise along the body. The circular muscles encircle the body and help in increasing or decreasing the width of the organism.
Aquatic annelids like Nereis have parapodia or leg appendages which are present in every segment. It helps in swimming in aquatic annelids. But parapodia are absent in Pheretima.
Gizzard and crop are part of the digestive system in annelids and they do not play any role in locomotion.
Nephridia are special excretory organs that help in osmoregulation, which is the maintenance of water content in the body as well as in getting rid of the wastes of the body.
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