appendicular skeleton
Definition
- Noun:
- The appendicular skeleton is the division of the vertebrate skeleton that consists of the bones of the limbs and the girdles (shoulder and pelvic) that attach them to the axial skeleton. Its primary function is to enable movement and manipulation of the environment.
Usage
The term appendicular skeleton is used in anatomical, biological, and medical contexts to distinguish the bones involved in locomotion and grasping from the central core of the body (the axial skeleton). It is a standard, formal term.
Examples
- In human anatomy, the appendicular skeleton comprises 126 bones.
- The femur and humerus are major bones of the appendicular skeleton.
- A comparative study examined the appendicular skeleton in various mammals to understand evolutionary adaptations for movement.
Advanced Usage
- The term is often used in contrast with "axial skeleton." For example: "The human skeleton is divided into two main parts: the axial skeleton and the appendicular skeleton."
- It can be modified to specify a particular group's anatomy: "the avian appendicular skeleton" or "the fossilized appendicular skeleton of the dinosaur."
Variants and Related Words
- Appendicular (adjective): Of or relating to an appendage or limb, or to the appendicular skeleton. (e.g., musculature).
- Axial skeleton (noun): The central, core part of the skeleton (skull, vertebral column, rib cage), to which the appendicular skeleton is attached.
Synonyms
- Limb skeleton (This is a less precise descriptive synonym, as it may not always explicitly include the girdle bones).
Different Meanings
The term appendicular skeleton has a single, specific meaning in anatomy. It does not have idiomatic or figurative uses.
Noun
-
the part of the skeleton that includes the pectoral girdle and the pelvic girdle and the upper and lower limbs
