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Survey of Animals from the Phylum Chordata

Survey of Animals from the Phylum Chordata. Sub Phylum Vertebrata. Common Chordate Features. All Chordates, at some point in their lives have four features: (Click). Notochord: a rod of stiffened tissue supporting the body (later develops into bony units comprising the vertebral column).

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Survey of Animals from the Phylum Chordata

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  1. Survey of Animals from thePhylum Chordata Sub Phylum Vertebrata

  2. Common Chordate Features All Chordates, at some point in their lives have four features:(Click) • Notochord: a rod of stiffened tissue supporting the body (later develops into bony units comprising the vertebral column). • Dorsal Nerve Chord: located just above the notochord and gut region (protected by vertebrae after full development) • Muscular Pharynx: the entrance to the digestive tract (with small gill slits) • Tail (or rudiment thereof): located near the anus

  3. Key Characteristics: Click to Continue • Body Temperature Regulation • Ectotherm: body changes temperature in response to external environment • Homeotherm: temperature remains constant regardless of external environment • # Of Heart Chambers • Two: (atrium/ventricle) allows for mixing of deoxygenated & oxygenated blood • Three: (2 atria/1 ventricle) more efficient separation of deO2 & O2 blood • Four: (2 atria/2 ventricles) complete separation of deO2 & O2 blood • Respiratory Organs (Exchange of 02 & CO2) • Lungs, Gills, Skin: moist membranes designed for gas exchange in/out of blood • Reproductive Structures (Embryo Development) • Internal Amniotic Egg: develops inside of mother and contains amnion/amniotic fluid • External Amniotic Egg: develops outside of mother and contains amnion/amniotic fluid • Aquatic Egg: contains no amnion and develops in a liquid (aquatic) environment • Excretory Mechanisms (H2O Conservation) • Urea: liquid waste released by specialized excretory structures (toxic if accumulates) • Uric Acid: solid waste (conserves H2O, non-toxic, & therefore can be stored)

  4. Class Pisces (Fish) Click to continue

  5. Class Amphibia Click to continue

  6. Class Reptilia Click to continue

  7. Class Aves (Birds) Click to continue

  8. Class Mammalia Click to continue

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