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Programs of the Brain
Phylum (Pl. Phyla) : Classes of different organisms having some features in common are included in a phylum. The phylum chordaia includes a number of classes such as amphibia, reptilia and mammalia. In the case of the plants, several classes constitute a division which is equivalent to the phylum of the animal kingdom.
Example : Phylum Arthropoda is divided into four classes – Crustacea, Myriapoda, Insecta and Arachnida.
Class Crustacea - crab, prawn. Class Myriapoda — centipedes and millipedes. Class Insecta — butterfly, cockroach, bed-bug, mosquito, fly. Class Arachnida -- scorpion, spider. Genus Musca — flies. Species Musca Domestica -- housefly.
PHYLUM CHORDATA
Sub-Phylum
Cepalochordata
Urochordata
Hemichordata
Vertebrate
or Craniata
Protochordata
Superclass
Gnathostamata
Agaatha
Cyclostomata
Chondrichthyes Osteich Amphibia Reptilia Aves Mammalia
thyes Elasmobranchi
or
1. Structure of the Brain
Let us begin our discussion with some questions : What is a brain ? How does it operate? How does it know and think? How does one learn, remember and forget? How do all these processes go on in the brain
