Bio 1306 Week 10 Notes
Bio 1306 Week 10 Notes Bio 1306
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GEOL 1313 - 002
Diana Hernandez Vega
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This 1 page Class Notes was uploaded by Kimberly Rodriguez on Saturday April 23, 2016. The Class Notes belongs to Bio 1306 at University of Texas at El Paso taught by in Spring 2016. Since its upload, it has received 16 views. For similar materials see Organismal Biology in Science at University of Texas at El Paso.
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Date Created: 04/23/16
Organismal Biology Dr. Carl S. Lieb Week 10 Notes Deuterostome Phylum Chordates All of the chordates have four features in common: Dorsal, hollow nerve cord: resulting from the infolding of the dorsal ectoderm gastrula. Notochord: rod-like endoskeletal structure that runs down the middle used for muscle attachement for swimming muscles Post anal tail: muscular, for swimming Pharyngeal slits: used to support gills and facilitate gas exchange with water. In terrestrials, they are Subphyla usually sealed off as adults. Lancets and Tunicates Filter feeders that lack vertebrae Vertebrate Subphyla and their Innovations 1) Cranium: used to be a cartilaginous box and later the cartilage is replaced by bone 2) Bone: connective tissue supplied with blood vessels and contains calcium phosphate. 3) Vertebrae: cartilage arranged in repeating units to make a column. Used to protect the nerve cord and large blood vessels. 4) Jaws: is a key adaptation foe feeding. They formed from supporting cartilages of the first pharyngeal slit. 5) Pectoral & pelvic girdles: bony structures that attach the bony elements of the limbs to the vertebral column. Girdles evolved to support the body mass out of water on land. 6) Amniotic egg: egg that can be laid in a dry, terrestrial habitat without the embryo drying.
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