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The nervous system segmentation confers several developmental advantages to the vertebrate body as humans possess a body plan that is bilaterally segmented at the nervous system level. The segmentation is involved at all levels of the human nervous system with increasing level of complexity in the innervation from the brain to limbs. [1] The ...
Layers of the Alimentary Canal.The wall of the alimentary canal has four basic tissue layers: the mucosa, submucosa, muscularis, and serosa. The enteric nervous system in humans consists of some 500 million neurons [11] (including the various types of Dogiel cells), [1] [12] 0.5% of the number of neurons in the brain, five times as many as the one hundred million neurons in the human spinal ...
Cephalization is a characteristic feature of the bilaterians, a large group containing the majority of animal phyla. [3] These have the ability to move, using muscles, and a body plan with a front end that encounters stimuli first as the animal moves forwards, and accordingly has evolved to contain many of the body's sense organs, able to detect light, chemicals, and gravity.
Segmentation appears to be regulated by the gene Hedgehog, suggesting its common evolutionary origin in the ancestor of arthropods and annelids. [6] Within the annelids, as with the arthropods, the body wall, nervous system, kidneys, muscles and body cavity are generally segmented.
Segmentation (biology), the division of body plans into a series of repetitive segments Segmentation in the human nervous system; Internodal segment, the portion of a nerve fiber between two Nodes of Ranvier; Segment, in fruit anatomy, a section of a citrus fruit; Parts of a genome, especially in virology
Poorly managed chronic stress can take a serious toll on your nervous system, as well as your emotional and mental health. Research shows it can also negatively impact your physical well-being.
Segmentation in the human nervous system; Sensory maps and brain development; SIX3; Slit (protein) Slit-Robo; Subependymal zone; Subgranular zone; Subplate; Subventricular zone; Synaptic pruning; Synaptogenesis; Synaptotropic hypothesis
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