BIOL373 Chapter Notes -Choroid Plexus, Dorsal Root Ganglion, Arachnoid Granulation
22 May 2013
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First multicellular animals to develop neurons were cnidaria, the jellyfish and sea anemones: nervous system consists of a nerve net composed of sensory neurons, connective interneurons and motor neurons, no identifiable control centre. Advantages of cephalic brains: head is the part of the body that first contacts the environment, as brains evolved, they became more associated with cephalic receptors such as eyes, ears and taste. In higher arthropods, such as insects and octopus, specific regions of the brain are associated with particular functions: more complex brain more complex behaviours. Most dramatic change is seen in the forebrain region, which includes the cerebrum. Cerebrum is the part of the brain that makes humans, human: responsible for reasoning and cognition. Convoluted surface of cerebrum caused to rapid growth in confined space. Body segmentation can be seen in bony vertebrae which are stacked on top of one another and.
