Embryos
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ppt - Embryos

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Embryos Presentation Transcript

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