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Earthworms have no skeleton, but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. This is due to
- a)Blood
- b)Setae
- c)Coelomic fluid
- d)Gut peristalsis
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Earthworms have no skeleton, but during burrowing, the anterior end be...
The body cavity (coelom) of an earthworm is filled with an alkaline, colourless or milky coelomic fluid containing water, salts, some proteins and four types of coelomic corpuscles, ie, phagocytes, mucocytes, circular nucleated cells and chloragogen cells. The coelomic fluid becomes turgid and acts as a hydraulic skeleton during burrowing.
Earthworm (Pheretime posthuma) living in burrows which are made in moist earth. It makes its burrow which is made in the moist earth. it makes its burrow partly by boring with its pointed anterior end and partly sucking and swallowing the earth. The body shows metameric segmentation. About the middle of each segment, there is a ring of tiny curved bristles called setae or chaetae, formed of any nitrogenous organic substance known as chitin. The setae and musculature serve for locomotion as well as for anchoring body firmly in the burrow.
The blood of earthworm is composed of a fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of vertebrates.
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Earthworms have no skeleton, but during burrowing, the anterior end be...
The hydraulic skeleton is the system of support found in soft -bodied invertebrates, which relies on the incompressibility of fluids contained within the body cavity. In earthworms, the coelomic fluid is under pressure within the coelom and therefore provides support for internal organs. Due to the hydraulic skeleton, during burrowing the anterior end becomes turgid and AIDS in relaxation of longitudinal muscles.
So, the correct answer is 'Coelomic fluid '.
So, the correct answer is 'Coelomic fluid '.
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Earthworms have no skeleton, but during burrowing, the anterior end be...
The body cavity (coelom) of an earthworm is filled with an alkaline, colourless or milky coelomic fluid containing water, salts, some proteins and four types of coelomic corpuscles, ie, phagocytes, mucocytes, circular nucleated cells and chloragogen cells. The coelomic fluid becomes turgid and acts as a hydraulic skeleton during burrowing.
Earthworm (Pheretime posthuma) living in burrows which are made in moist earth. It makes its burrow which is made in the moist earth. it makes its burrow partly by boring with its pointed anterior end and partly sucking and swallowing the earth. The body shows metameric segmentation. About the middle of each segment, there is a ring of tiny curved bristles called setae or chaetae, formed of any nitrogenous organic substance known as chitin. The setae and musculature serve for locomotion as well as for anchoring body firmly in the burrow.
The blood of earthworm is composed of a fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of vertebrates.
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Earthworms have no skeleton, but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. This is due toa)Bloodb)Setaec)Coelomic fluidd)Gut peristalsisCorrect answer is option 'C'. Can you explain this answer?
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