Embryos

362 views

Published on

ppt - Embryos

Published in: Health & Medicine, Technology
  • Be the first to comment

  • Be the first to like this

Embryos

  1. 1. BASIC BODY PLAN From a two-layered sheet to a segmented tube within a tube
  2. 2. <ul><li>Sagittal view of “generic” vertebrate embryo/body plan </li></ul><ul><li>Draw gut tube within “outer” tube </li></ul><ul><li>Mouth, anus </li></ul><ul><li>Cut across middle to see cross (or transverse) section </li></ul>
  3. 3. <ul><li>Outer(“somatic”) tube </li></ul><ul><ul><li>--striated muscle </li></ul></ul><ul><ul><li>--somatic motor nerves </li></ul></ul><ul><li>Inner (“visceral”) tube </li></ul><ul><ul><li>--smooth muscle </li></ul></ul><ul><ul><li>--visceral motor nerves </li></ul></ul><ul><li>Celom or Body Cavity </li></ul><ul><ul><li>--empty space between tubes </li></ul></ul>
  4. 4. Celom and diaphragm in sagittal section view
  5. 5. <ul><li>THE INNER TUBE </li></ul><ul><li>Gut </li></ul><ul><li>Serous lining </li></ul><ul><li>(peritoneum) </li></ul><ul><li>Mesenteries </li></ul><ul><li>Celom/Body Cavity/ </li></ul><ul><li>Peritoneal Cavity </li></ul>
  6. 6. <ul><li>THE OUTER TUBE </li></ul><ul><li>Neural tube—brain, spinal cord </li></ul><ul><li>(Dorsal Hollow Nerve Tube) </li></ul><ul><li>Notocord </li></ul><ul><li>Vertebra </li></ul><ul><li>Muscle, Nerve, Skin, Bone </li></ul><ul><li>LIMBS!! </li></ul><ul><li>SEROUS MEMBRANES </li></ul><ul><li>Peritoneum </li></ul><ul><ul><li>--visceral </li></ul></ul><ul><ul><li>--parietal/somatic </li></ul></ul><ul><li>Pleura </li></ul><ul><ul><li>--visceral </li></ul></ul><ul><ul><li>--parietal/somatic </li></ul></ul><ul><li>Mesentery </li></ul>
  7. 7. <ul><li>SEGMENTATION </li></ul><ul><li>Brain and spinal cord </li></ul><ul><li>Notocord </li></ul><ul><li>Vertebrae and Ribs </li></ul><ul><li>Segmented Spinal Nerves </li></ul><ul><li>Sensory Areas (dermatomes) </li></ul><ul><li>Muscle Segments (myotomes) </li></ul>

×