BIOB33H3 Lecture Notes - Lecture 5: Fot, Cervical Vertebrae, Lumbar Vertebrae
9 Mar 2013
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Document Summary
The skeletal system: axial & appendicular divisions (based on chapters 6, 7 and 8) Neurulation - process of nervous system formation from ectoderm. Neurulation starts with signals sent out by notochord: Notochord extends down the midline from the mesoderm short rod of condensed mesoderm cells right underneath ps, induces (process of induction) cells of the ectoderm to form a hollow nervous system tube - neurulation. Eventually the neural tube runs the length of the embryo note: spinabifida is the failure of the tube to close, skin doesn"t grow over the neural tube and it is exposed to the environment. 4: head mesenchyme - connective tissue and musculature of face. Endoderm - inner-most tissue after embryonic folding forms lining of digestive, respiratory and urinary tracts, thyroid gland, parathyroid gland, thymus, liver, gallbladder and pancreas. The skeleton is divided into 2 portions: the axial skeleton and the appendicular skeleton.
