Question

Arthropoda means segmented legs : *

Answer 1

• Arthropoda means jointed legs.
• Greek - arthros meaning joint and podos mean legs.
• Features of the Arthropoda phylum are
  1. Segmented body
  2. The fusion of sets of segments to gives rise to the functional body region. This is called the tagma.
  3. Tagma may be in the form of
     1. Head
     2. Thorax
     3. Abdomen
     4. Cephalothorax
  4. Central cavity called the hemocoel
  5. An open circulatory system is regulated by a tubular or single-chambered heart.
  6. The respiratory system varies from spiracles, gills, lungs.
  7. The cuticle is the covering of the arthropod. It is made up of two layers
     1. Epicuticle - thin, waxy, water-resistant outer layer. this layer is devoid of chitin
     2. Chitinous procuticle - It layer contain chitin. Chitin is a polysaccharide which is touch and flexible.