Anatomy and Cell Biology 3319 Chapter Notes -Interthalamic Adhesion, Inferior Colliculus, Cuneate Nucleus
3 Mar 2014
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Document Summary
Forms subectodermal bulges on the back makes first body segments: cranial caudal, dermis of dorsal cavity, part of vertebrae or ribs, muscles of trunk & limbs. Splanchnic mesoderm next to endoderm (visceral: wall of digestive & respiratory tracts, visceral serosa, heart. Spinal bifida doesn"t zip in caudal (tail) region, leads to malformation of spine, spinal cord & lower limb nerves. Anencephaly - doesn"t zip in rostral (cranial/head) region, rudimentary brain stem (no cerebral hemispheres) - die. Ectopic pregnancy tubal pregnancies (rupture possibility) & implantation can occur in cervix, ovaries, & abdomen. Intermediate: divides into spherical segments, cranial caudal. 2 sperm, 2 egg 2 zygotes: different placenta, different amnions. Pns nerves & ganglia (collection of neuronal cell bodies) Sensory (afferent) division: somatic sensory, visceral sensory, motor (efferent) division, somatic motor. Touch, pain, pressure, vibration, temperature & proprioception, hearing, equilibrium & vision. Stretch, pain, temperature, chemical changes, irritation in viscera, nausea, hunger, taste & smell.
