ACCT 210 Lecture Notes - Lecture 19: Endocrine System, Vertebra, Lumbricus Terrestris

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Introduction to comparative and integrative physiology: comparative physiology looks at, the mechanisms that allow organisms to function, how the mechanisms came to be, evolutionary physiology is therefore important for this. Integrative physiology looks at: all levels of control of an organism, e. g. nervous and endocrine systems. Cnidaria are the only radially symmetrical phyla on this diagram : two groups of protostomes are, lophotrochozoa, have special feeding ring, ecdysozoa, grow by molting. Urochordata (sub phyla of chordata: e. g. sea squirt genome sequenced in 2002. Larval nervous system has: anterior cerebral ganglion, dorsal nerve cord that is very similar to vertebrates. Pn, posterior nerves: but the adult doesn"t have the dorsal nerve cord, so thought they were separate species, able to regrow cerebral ganglion from scratch if cut off or damaged. Cephalochordata (sub phyla of chordata: e. g. the lancelet (amphioxus, has a dorsal nerve cord, sequenced in 2008. Nervous system has 2 longitudinal nerve cords (dorsal and ventral: very rare.

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