Standard anatomical position
（重定向自Frankfurt plane）
![](/Images/godic/202501/14/View_of_Viscera_Page_824140.jpg")
![The anatomical position, with terms of relative location noted.](/Images/godic/202501/14/Directional_Terms4140.jpg")
Because animals can change orientation with respect to their environment, and because appendages (arms, legs, tentacles, etc.) can change position with respect to the main body, it is important that anatomical terms of location refer to the organism when it is in its standard anatomical position.