If the human body was split into two halves by the median line(a line which passes through the middle of the body), the number of cavities in each would be???

The number of cavities in each part of the human body when split into two halves would be ;  4 cavities

The human body contains 8 different cavities whose main functions are to protect sensitive organs from shock and also allows the change in size and shape seen in the organs they protect.

The 8 different cavities are ;

i) Serous membranes, ii)thoracic cavity,  iii)Ventral body cavity, iv)Abdominopelvic Cavity, v) Retroperitoneal space,  vi)Pelvic cavity, vii)Dorsal cavities and  viii) Ventral cavity

Therefore we can conclude that when the body is divided into 2 equal parts each part will have at least 4 cavities.

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this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.