What form the main axis of the skeleton?

What form the main axis of the skeleton?

axial skeleton
The axial skeleton forms the central axis of the body and includes the bones of the skull, ossicles of the middle ear, hyoid bone of the throat, vertebral column, and the thoracic cage (ribcage) (Figure 1).

What is the axis in the skeletal system?

The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. In the human skeleton, it consists of 80 bones and is composed of six parts; the skull (22 bones), also the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.

What is the main structure of the skeleton?

bones
The skeletal system is composed of four main fibrous and mineralized connective tissues : bones, ligaments, tendons, and joints. Bone: A rigid form of connective tissue that is part of the skeletal system of vertebrates and is composed principally of calcium.

What are the three main parts of the axial skeleton?

The axial skeleton forms the central axis of the human body and consists of the skull, vertebral column, and thoracic cage.

What is the major function of the axial skeleton quizlet?

List the functions of the Axial Skeleton. The axial skeleton serves as a framework that supports and protects organs, provides and extensive surface area for muscle attachment, and it also stabilizes and positions parts of the appendicular skeleton that support the limbs.

Where is the axis on the skeleton?

cervical vertebra
Anatomical terms of bone In anatomy, the axis (from Latin axis, “axle”) or epistropheus, is the second cervical vertebra (C2) of the spine, immediately inferior to the atlas, upon which the head rests.

What is atlas and axis?

The atlas is the topmost vertebra and, with the axis (the vertebra below it), forms the joint connecting the skull and spine. The atlas and axis are specialized to allow a greater range of motion than normal vertebrae. They are responsible for the nodding and rotation movements of the head.

What is the distal skeleton?

The Proximal skeleton The femur and humerus (ie the bones proximal to the Axial skeleton) The Distal skeleton. The lower legs (tibia, fibula, and feet bones) and lower arm (radius, ulna, and bones of the hand). The Proximal and Distal skeleton are sometimes collectively referred to as bones of the extremities.

What are the three parts of the axial skeleton?

Ans: Axial skeleton can be divided into three parts: the skull, vertebral column, & the rib cage or thoracic cage. Q.3. Where is the axial skeleton located? Ans: The axial skeleton lies along the central longitudinal axis of the human body.

What are the two parts of the skeletal system?

The skeletal system of humans can be basically divided into two parts (i) the axial skeleton and (ii) the appendicular skeleton. The axial skeleton constructs the central axis of the body, while the appendicular skeleton comprises the limbs and girdles.

Is the sternum part of the axial skeleton?

Are ribs axial or appendicular? Ans: Axial skeleton includes the bones of the skull, vertebrae, thoracic cage, hyoid bone and ear ossicles. Ribs and sternum are part of the thoracic cage. So, ribs are part of the axial skeleton.

What makes up the tailbone of the human skeleton?

The coccyx, or tailbone, is formed by a fusion of four vertebrae. The bones of the human skeleton are divided into two groups. The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. The axial skeleton includes all the bones along the body’s long axis.