What are some special features in arthropoda
Phylum Arthropoda
The word ‘Arthropoda’ means ‘animals with jointed legs’. It is the largest phylum of the animal kingdom and includes more than 900000 species.
General features of arthropods
- They are found everywhere on Earth.
- An arthropod has a segmented body like that of an annelid. The body is divided into three regions—the head, the thorax and the abdomen.
- The body is covered by an exoskeleton made of chitin.
- Arthropods have an organ system level of organization.
- They show bilateral symmetry. They are triploblastic animals. Schizocoelom is present.
- They have certain advanced features.
- A distinct head is present. There are jointed legs for moving around.
- An open circulatory system is present, i.e., blood does not flow in well-defined blood vessels. Thus, their coelomic cavity is filled with blood.
- Examples of arthropods: crab, Palaemon (prawn), insect, spider, scorpion, centipede, millipede, cockroach, housefly, mosquito