BIOM 182Bang, Michel(Christofer)2013 SpringWeek 8Lecture 18February 27Today's Lecture:Deuterotome- Radical Cleavage- Mouth forms opposite the blastopore- Coelom develops form mesodermal pockets that bud off from the cavity of thegastrulaEchindoerms -System of internal calcified plates by thin layers of skin and some muscle. The platesfuse to form an internal.Ex. Sea stars, sea urchins, and theirHemichordates *Know Acorns Worms and PterobranchsEx. Acorn warms and pterobranchsChordatesThree Chordate clades: Urochordates, Cephalochordates, VertebratesUrochoradtes: All marine animalsCephalochordates: Sharks, Chimaeras live in deep sea, cold waters, skates and raysVertebrates Characteristics :These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Anterior skull with a large brain- Rigid internal skeleton supported by the vertebral column- Internal organs suspended in a coelom- Well-developed circulatory system with a ventral heart Ex. Sea squirts, lancelets, and vertebratesLepidosaurs- Squamates- lizards, snakes, and amphisbaenians- Tuataras- resemble lizards; only two species survive- Lepidosaurs have skin covered with horny scales. Gas exchange is only through the lungs*Know Amphibians and
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