AP Bio 7 - Animals Phylum Chordata share a set of derived characters Some only exhibit traits during embryonic development Four key characters of

AP Bio 7 - Animals Phylum Chordata share a set of derived...

This preview shows page 1 - 6 out of 24 pages.

10/5/09 Animals Phylum Chordata share a set of derived characters Some only exhibit traits during embryonic development Four key characters of chordates: Notochord Dorsal, hollow nerve cord Pharyngeal slits or clefts Muscular, post-anal tail
10/5/09 LE 34-3 Pharyng eal slits or clefts Mout h Bra in Dorsal, hollow nerve cord Notoch ord Muscl e segm ents Muscula r, post- anal tail An us
10/5/09 Notochord longitudinal, flexible rod between the digestive tube and nerve cord provides skeletal support In most vertebrates, jointed skeleton develops, and the adult retains only remnants of the embryonic notochord
10/5/09 Dorsal, hollow nerve cord develops from a plate of ectoderm that rolls into a tube dorsal to the notochord develops into the central nervous system Brain spinal cord
10/5/09 Pharyngeal slits or clefts In most chordates, develop into slits that open to the outside of the body Functions of pharyngeal slits: Suspension-feeding structures in many invertebrate chordates Gas exchange in aquatic vertebrates Develop into parts of the ear, head, and neck in terrestrial vertebrates

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture