How is the old skeleton of crab different from the new one?
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It has to do with the crab’s skeletal system. Crabs, like other crustaceans, periodically molt. That is, the crab sheds its hard shell and forms a new one.
When a blue crab sheds its hard shell, its exoskeleton, it has to wait about a week for the new shell to harden. Before that happens, the outer layer of tissue is too soft and flexible to transmit muscle contractions as it did, It will start to function again when the crab’s new shell hardens. And yet these creatures are somehow still able to move about, even immediately after molting. They’re able to do this by using a hydrostatic skeleton.
When a blue crab sheds its hard shell, its exoskeleton, it has to wait about a week for the new shell to harden. Before that happens, the outer layer of tissue is too soft and flexible to transmit muscle contractions as it did, It will start to function again when the crab’s new shell hardens. And yet these creatures are somehow still able to move about, even immediately after molting. They’re able to do this by using a hydrostatic skeleton.
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usually there used to be great Hustle and bustle when the school begin the Din of appearing and closing of the decks lessons being repeated in anus and and the wrapping of the teacher ruler on the table could be hard out in the street but but that day it was all very cute and still US on a Sunday morning
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