The Human Skeleton: Axial vs Appendicular
Which bones are part of the axial skeleton and which are part of the appendicular skeleton?
The ribs are part of the ____________ skeleton.
The cranium (head) is part of the ____________ skeleton.
The pelvis is part of the ____________ skeleton.
The collarbone is part of the ____________ skeleton.
The tail is part of the ____________ skeleton.
The femur is part of the ____________ skeleton.
Answer:
The ribs, cranium, and tail are part of the axial skeleton, while the pelvis, collarbone, and femur are part of the appendicular skeleton.
The human skeleton is traditionally divided into two major parts: the axial skeleton and the appendicular skeleton. The axial skeleton includes bones that form the central axis of the body and is comprised of the skull, vertebral column, and thoracic cage, which includes the ribs and sternum. On the other hand, the appendicular skeleton consists of the bones of the upper and lower limbs, as well as the girdles that attach the limbs to the axial skeleton.
The ribs, cranium, and tail are categorized as part of the axial skeleton due to their central positioning in the body and function in protecting vital organs. The cranium, or head, serves to encase and protect the brain, while the ribs and the tail (coccyx) contribute to the structure and support of the body's core.
On the other hand, the pelvis, collarbone (clavicle), and femur belong to the appendicular skeleton. The pelvis is specifically attached to the pelvic girdle, which supports the lower body and provides attachment points for many muscles. The collarbone forms part of the pectoral girdle, aiding in the movement and flexibility of the arms. Lastly, the femur, as the thigh bone, is crucial for walking, running, and overall lower body strength.
In conclusion, the division of the human skeleton into axial and appendicular components helps us to understand the functions and structures of the different bones in our bodies. By categorizing bones based on their location and function, we can appreciate the intricate design of the skeletal system and how it supports our everyday movements and activities.