What common traits do organisms share in group Crustacea?
1 Answer
May 30, 2017
Crustaceans are characterised by a hard exoskeleton, jointed legs and a bilaterally symmetrical segmented body.
Explanation:
Main features of crustaceans are :
- a hard exoskeleton made up of calcium.
- the head has two compound eyes, two pairs of antennae and
three pairs of mouth parts. - a pair of green glands excrete waste near the base of antennae.
- the abdominal segments have swimming legs.
- the sexes are separate
- the tail is fan shaped and ends in uropod and telons.
- the circulatory system is open. There is no heart and the blood is
pumped into sinuses instead of a closed loop. - the nervous system consists of a primitive ventral nerve cord and
ganglia system.
Most crustaceans live in water, but some live on land. There are about 30,500 known species of crustaceans around and he world.