'Class cephalaspidomorphi' presentation slideshows

Part 3

987 views • 72 slides

Phylum Chordata

Phylum Chordata. Notochord in embyronic stage Dorsal hollow nerve cord Pharyngeal slits Muscular, post anal tail. Tunicates: Urochordata. most primal form of all vertebrates pharyngeal gill slits Dorsal nerve cord notochord separate mouth and anus. Circulatory System.

763 views • 58 slides

Fishes

Fishes. Chapter 39. Introduction to Vertebrates. Section 39.1. Vertebrate Characteristics. Only 1 phylum: Chordata Three distinguishing characteristics : Vertebrae : bones or cartilage that surrounds and protects dorsal nerve cord (spine) Cranium : skull that protects the brain

592 views • 49 slides

Fishes

Fishes. Chapter 39. Introduction to Vertebrates. Section 39.1. Vertebrate Characteristics. Only 1 phylum: Chordata Three distinguishing characteristics : Vertebrae : bones or cartilage that surrounds and protects dorsal nerve cord (spine) Cranium : skull that protects the brain

530 views • 41 slides

Phylum Chordata

Phylum Chordata. Subphylum Craniata (Vertebrata). Phylum Chordata, Subphylum Vertebrata (Craniata). Increase in brain size & sensory apparati Derivation of neural crest Enclosure of anterior neural tube in cartilage/bone (neural crest derivative)

806 views • 40 slides

phylum Chordata

phylum Chordata. around AT LEAST since Cambrian 2 cm long, no appendages or eyes for 200 my restricted to ocean, ~360 mya evolved appendages, moved to land ~60,000 (?) extant species 5500 spp. mammals (and 1/5 th of those = bats) although numbers not impressive, size is:

349 views • 19 slides

Hagfish

599 views • 15 slides

Wakefield 2011-2012

268 views • 14 slides