When biologists and doctors describe where a specific organ or body part is located, they cannot use simple words like 'top' or 'bottom' because an animal's position changes when it moves. Instead, they use universal anatomical directional terms. 'Dorsal' is one of the most important ones.
In human anatomy, the back of your hand is called the dorsal surface, while the palm is the palmar surface.
The human nervous system features a 'Dorsal Root' in the spinal cord, which is responsible for carrying sensory information from the body back to the brain.
The exact opposite of Dorsal is Ventral.
Because humans walk upright on two legs, the terminology feels a bit different, but the rule remains the same:
If a doctor asks a patient to lie in a dorsal recumbent position, it means the patient must lie flat on their back, facing the ceiling, usually with their knees slightly bent.
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