Kingdom
Animalia have 5 Phyla.
1. Chordata: Vertebra: Birds, Mammals, Fish, Reptiles, Amphibians
2.
Arthropoda: Invertebrates in entomology subject.
3. Mollusca: Snails, Shells
4. Porifera: Sponges
5.
Protozoa: Plasmodium
Salient
Characteristics of Phylum Arthropoda (Arthros=jointed, Poda=foot):
1.
Jointed-footed animals
2.
Paired jointed appendages.
3.
Body is made up of segments.
4.
They have hard exoskeleton made up of chitin. They
shed their skins to increase in size.
5.
They grow in stages/bits.
6.
Have to shed skin time to time.
7.
Open circulatory system(blood flows freely in cavity
called hemolymph).
8.
They have ventral nervous system in form of ganglion.
(Ganglia is mass of nerve fibers).
9.
For the exchange of gases they have trachea, skin or
book lungs.
10.
Blood of Arthropods have no hemoglobin and gases
transport activity.
11.
Gut/Elementary canal is divided into i. Foregut ii.
Midgut iii. Hindgut.
Major
classes of Phylum Arthropoda:
1.
Insecta: Butterfly, Silk worm
2. Arachnida: Spiders, Sticks, Mites.
3. Crustacea 4. Chilopoda
5. Diplopoda
