United States or Antigua and Barbuda ? Vote for the TOP Country of the Week !
But in a crab, the whole plan has been modified by the shortening and broadening of the head-thorax, and by the reduction of the abdomen, which is also turned under the anterior part of the body. The internal organic systems are constructed upon a worm plan with modifications.
They have a rounded oval body, without the usual division between the head-thorax and abdomen observable in spiders, the head-thorax and abdomen being merged in a single mass. These parts form a beak which the mite or tick insinuates into the flesh of its host, upon the blood of which it subsists.
Word Of The Day