狠狠撸

embryology ganglia neuron neuroglia primordial germ cells grey matter gubernaculum secondary cortical cords imperforate hymen paramesonephric ducts vaginal atresia congenital hydrocele indifferent gonads urogenital ridge descent of testes wolffian duct female reproductive tract mullerian duct male reproductive tract testes determining factor gonadal ridges intramembranous ossification endochondral ossification dermatomes epimere hypomere embryonic connective tissue midgut loop white matter nuclei microglia astrocytes schwaan cells pns ependymal cells cranial nerves splanchnic nerves postganglionic fibers preganglionic fibers amygdala hippocampus hypothalamus parasympathetic ganglia sympathetic ganglia spinal nerves brainstem whate matter meninges spinal cord autonomic cns oogonia physiological herniation.