asymetry system in metazoa
Answers
Answer:
Radially symmetrical organisms have body plan in which every side is the same around an axis. In contrast, there are organisms lacking external symmetry and are described as asymmetrical.
Explanation:
Asymmetries are observed in a great number of in metazoans. More particularly, functional lateralization and neuroanatomical asymmetries within the central nervous system have been a matter of intense research for at least two hundred years. While asymmetries of some paired structures/organs (e.g. eyes, ears, kidneys, legs, arms) constitute random deviations from a pure bilateral symmetry, brain asymmetries such as those observed in the cortex and epithalamus are directional. This means that molecular and anatomical features located on one side of a given structure are observed in most individuals. For instance, in humans, the neuronal tract connecting the language areas is enlarged in the left hemisphere.
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