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*abbreviated “CNS”*
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(the central nervous system is the part of the ‘nervous system’ consisting of the ‘brain’ + ‘spinal cord’)
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(the ‘central nervous system’ is so named because it integrates ‘information’ it receives from, and coordinates and influences the activity of all parts of the bodies of ‘bilaterally symmetric animals’—that is, all ‘multicellular animals’ except ‘sponges’ and ‘radially symmetric animals’ such as ‘jellyfish’ — and it contains the majority of the ‘nervous system’)
(many consider the ‘retina’ and the ‘optic nerve’ (“2nd cranial nerve”), as well as the ‘olfactory nerves’ (1st) and ‘olfactory epithelium’ as parts of the ‘CNS’, synapsing directly on ‘brain tissue’ without intermediate ‘ganglia’)
(following this classification the olfactory epithelium is the only central nervous tissue in direct contact with the environment, which opens up for therapeutic treatments)
(the CNS is contained within the dorsal body cavity, with the brain housed in the cranial cavity and the spinal cord in the ‘spinal canal’)
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(in ‘vertebrates’, the ‘brain’ is protected by the ‘skull’, while the ‘spinal cord’ is protected by the ‘vertebrae’, both enclosed in the ‘meninges’)
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👈👈👈☜*“THE HUMAN NERVOUS SYSTEM”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥