Body+Parts+and+Functions

=Crayfish Body Parts and Functions= A crayfish has no back bone. The two main parts of a crayfishes body is a thorax and head. They have large compound eyes. Crayfish can regenerate their limbs that means they can replace a body part. Thier tails are used for swimming backwards fast. They have hard and smooth shells.They have 5 pairs of legs. They're attached to the thorax.The Exoskeleton acts like a suit of armor to protect the soft inner body tissues.A special shield called the carapace protects the crayfish's head and midsection,or thorax.The gills take in oxygen from the water. Special sensory hairs on its antennae help the crayfish find food. The crayfish has a small antennae and large antennae.An ear opening is at the base of the smaller antennae.All crayfish have the same basic bodt structure.The head and the thorax together are called the cephalothorax.The back section of the body is is the abdomen.It is commonly called the tail.The crayfish have two sets of feelers, or antennae.Antennae's are lined with sensory hairs.The pincers are also covered with tiny hairs,which are sen sitive to touch, smell, and taste.Crayfish can walk forward, backward, and sideways. The crayfish mouthparts move from side to side, rather than up and down, as people's jaws do. All crayfish have the following:
 * Antennae
 * Pincer
 * Rostrum
 * Movable Finger
 * Head
 * Thorax
 * Tail
 * Tail Fin
 * Thorax
 * Abdomen
 * Walking Legs

Crayfish breathe with gills, just like fish do.Crayfish shower themselves in sand.The crayfish's eyes stand out slightly from the head on eyestalks

At the base of the smaller antennae,there are tiny "ear" openings. Crayfish cannot hear, but they can detect vibrations in the water.