There are a few terms that doctors use to nagivate around the body.
'superior' = means 'higher' or 'towards the head'
'inferior' = opposite of superior
'caudal' = towards the tail-end
'cranial' = towards the head-end
'medial' = towards the mid-line
'lateral' = away from the mid-line
'superficial' = closer to the surface
'deep' = further away from the surface
There are lots of others related to various organs but these are the main ones. Some examples of these Words in sentences... your nose is medial and inferior to your eyes. Your mouth is superior to your chin. Your teeth are deep to your lips. Your naval is caudal to your chest.
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