Question

The main features of arthropods. How can arthropods be described according to examples of representative species, basic morphology, type of symmetry, germ layers and coelom, digestive system, respiratory system, circulatory system, excretory system, nervous system and types of reproduction?

Answer 1

Answer=

The main features of arthropods are as follows:

1]Exoskeleton-arthropodes are invertebrates,which means their bodies do not have internal bones for support.

To compensate for this,they produce a hard exoskeleton made of chitin ,a mixture of lipids,carbohydrates and protein,which covers & protects their bodies like a suit of armor.

2]Segmented bodies= Arthropod have bodies that are internally & externally segmented.The number of segments depends on the individual species:milipedes ,for example,have more segments than lobsters.

3]Jointed appendages:The name arthropod actually comes from artho meaning joint,and pod meaning foot.

All arthropods have jointed limbs attached to their hard exoskeletons that allow for flexibility and movement.The joints generally bend in only one direction but allow for sufficient predatory and defensive actions.

4]Bilateral symmetry= An arthropod boby can be divided into two mirror images.This is called as bilateral symmetry.

5]Open circulatory system= An arthropod has an Open circulatory system .this means instead of a closed circulatory system of interconnected veins and capillaries ,an arthropod's blood is pumped through open spaces called sinuses in order to reach tissues.An arthropod does however ,have a heart which pumps blood into haemocoel,the cavity where the organ are located ,where it surrounds the organs and tissues.