seljaosas

Seljaosa is an Estonian anatomical term that denotes the back part or dorsal aspect of a structure. It is used to describe the portion of a body, organ, or object that is oriented toward the posterior side, opposite the ventraal or front portion.

In human or animal anatomy, the seljaosa refers to the dorsal side of the torso and limbs, extending from the neck down to the lower back. It covers surfaces, regions, and structures situated behind the sagittal plane along the body, and includes muscles, bones, and soft tissues located on the back.

In medicine or imaging, the term helps specify the location of pain, injuries, or surgical approaches that affect the posterior region. It is also used to describe the back part of non-biological objects, such as devices, garments, or mechanical components, where the posterior side is relevant.

Etymology and grammar: The word is formed from selg meaning “back” and osa meaning “part.” The plural form seljaosad refers to multiple back parts, while seljaosa appears in singular. The form seljaosas is a grammatical case form used in sentences such as “seljaosas on ….”

Related terms include dorsaalne or dorsal (also used in scientific contexts) and ventraalne or ventraal to indicate the opposite front side. These terms help distinguish the posterior (back) and anterior (front) aspects in anatomical descriptions.