'Head brain notochord ancestral' presentation slideshows

Chapter 34

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Chapter 34

Chapter 34. Vertebrates. Vertebrates. Get their name from vertebrae, the series of bones that make up the backbone. Vertebrates. There are approximately 52,000 species of vertebrates

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Chapter 34

Chapter 34. Vertebrates. Chordates. Craniates. Vertebrates. Gnathostomes. Osteichthyans. Lobe-fins. Tetrapods. Amniotes. Echinodermata (sister group to chordates). Chondrichthyes (sharks, rays, chimaeras). Cephalaspidomorphi (lampreys). Amphibia (frogs, salamanders).

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Lecture #14

Lecture #14. Phylum Chordata. Phylum Chordata. only 45,000 species characteristics: 1. bilaterally symmetrical 2. notochord 3. pharyngeal gill slits 4. dorsal, hollow nerve cord 5. post-anal tail 6. complete digestive system 7. thyroid gland 8. ventral, contractile heart.

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Osteichtheys Bony Fish

Osteichtheys Bony Fish. Main Characteristics. Endoskeleton hardened by Calcium phosphate Closed Circulatory system, two chambered Heart Deuterostomes with bilateral symmetry Notochord, a longitudinal flexible rod present in all embryos Dorsal hollow nerve chord

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