Title: Head and Neck Embryology1Head and Neck Embryology. R. Dale Reynolds. University of Texas at Houston. Plastic and Reconstructive Surgery2Branchial and Pharyngeal Arches.
Fourth week. Neural crest cells. Most skeletal and connective tissue in HN. Numbered cranial? Caudal. Four well-defined pairs visible externally. Fifth and sixth rudimentary.
Separated by grooves3Branchial and Pharyngeal Arches. First Mandibular.
There are main 5 classes of living echinoderms: crinoids (sea lilies and feather stars); asteroids (STARFISH); ophiuroids (brittle stars);.
Mandibular Prominence? Jaw. Maxillary Prominence? Maxilla/zyg/temp. Second Hyoid4(No Transcript)5Branchial and Pharyngeal Arches. Fate.
Typical arch contains. Aortic arch. Cartilaginous rod (skeleton of arch). Muscular component. Nerve6Branchial and Pharyngeal Arches7Pharyngeal Pouches.
First. Tubotympanic recess? Tympanic membrane.
Connects with pharynx? Eustachian tube.
Second. Palatine tonsil, tonsillar fossa. Third. Inferior parathyroid gland.
Thymus8Pharyngeal Pouches. Fourth.
Superior parathyroid gland. Ultimobranchial body fuses with thyroid. Parafollicular C cells? Calcitonin. Fifth. Rudimentary9(No Transcript)10Pharyngeal Pouches11Branchial or Pharyngeal Grooves. Four on each side.
Separate branchial or pharyngeal arches. First? External acoustic meatus.
Others lie in depression (cervical sinus) whichobliterates12Branchial or Pharyngeal Grooves13Branchial or Pharyngeal Membranes. Only one pair contribute to adult structures. First? PowerShow.com is a leading presentation/slideshow sharing website. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use.You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides andpresentations for free.
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Title: Phylum Echinodermata1Phylum EchinodermataECHINODERMS!2Class Crinoidea. Special Characteristics Mouth Faces Upward andis surrounded by many arms 600 species. Species include- Sea Lilies and Feather StarsFlorometra serratissima3Class Asteroidea. Body usually has five arms and double rows oftube feet on each arm. Mouth faces downward.
1,500 Species. Ex. Sea Star. Six-Rayed Starfish.
Leptasterias hexactis4Class Ophiuroidea. Usually has five slender and delicate arms orrays. 2,000 Species. Ex. Brittle Stars and Basket StarsDaisy Brittle Star-Ophiopholis aculeata5Class Echinoidea.
Body is Spherical, oval, or disck shaped. Arms lacking but five part body plan is stillseen. 900 Species. Ex. Sea Urchins and Sand Dollars. Centrostephanus rodgersii6Class Holothuroidea.
Elongated, thickened body. Tentacles around Mouth.
1,500 Species. Ex. PowerShow.com is a leading presentation/slideshow sharing website. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow.com is a great resource.
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