Home | | Science 9th std | Division Vertebrata (Craniata)

Kingdom Animalia - Division Vertebrata (Craniata) | 9th Science : Living World of Animals - Diversity in Living Organism - Kingdom Animalia

Chapter: 9th Science : Living World of Animals - Diversity in Living Organism - Kingdom Animalia

Division Vertebrata (Craniata)

This group is characterized by the presence of brain case or cranium and vertebral column.

Division Vertebrata (Craniata)

This group is characterized by the presence of brain case or cranium and vertebral column. The notochord is an embryonic structure gets replaced by a vertebral column which forms the chief skeletal axis of the body. They have ventral muscular heart with two, three or four chambers. The locomotor organs may be ns or limbs. Excretion and osmoregulation are carried out by a pair of kidneys. They exhibit sexual dimorphism.

 

1. Super Class: Pisces (Fishes)

Fishes are poikilothermic, aquatic vertebrates with jaws. The body is streamlined. It is differentiated into head, trunk and tail. Locomotion is by paired and median ns. The body has a covering of scales. Body muscles are arranged into segments called myotomes. Respiration is performed by gills. Gill slits are 5-7 pairs. They are covered by an operculum. The heart is two chambered with an auricle and a ventricle. Lateral line sense organs are well developed.



 

Tags : Kingdom Animalia , 9th Science : Living World of Animals - Diversity in Living Organism - Kingdom Animalia
Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
9th Science : Living World of Animals - Diversity in Living Organism - Kingdom Animalia : Division Vertebrata (Craniata) | Kingdom Animalia


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.