Structure function of axial skeleton

However, during normal development several vertebrae fuse together, leaving a total of 24, in most cases. This is how the vertebrae are counted: List of bones of the human skeleton View from both directions of a axial skeleton cut in half.

If you count the coccyx and sacrum each as one vertebra, then there are 26 vertebrae. As shown in the diagram of the axial and appendicular skeleton: As the skeleton grows older the bones get weaker with the exception of the skull. The vertebral column consists of 5 parts.

The ribs are shaped like crescents, with one end flattened and the other end rounded. Shows attachments to pelvis and does not show skull. In order to demonstrate thorough knowledge of the human skeleton together with understanding of the difference between the axial and appendicular skeleton students may be asked to list or label all of the named bones in each of the appendicular and axial skeletons.

Cervical vertebrae make up the junction between the vertebral column and the cranium. During development the eight separate plates of the immature bones fuse together into one single structure known as the Skull.

Flat bones house the brain and other vital organs. This article mainly deals with the axial skeletons of humans; however, it is important to understand the evolutionary lineage of the axial skeleton. The appendicular and axial skeleton is part of the basic terminology required when learning about anatomy.

The skull remains strong to protect the brain from injury. The cranium holds and protects the brain in a large space called the cranial vault. If the fused vertebrae are all counted separately, then the total number of vertebrae comes to between 32 and The most cranial uppermost part is made up by the cervical vertebrae 7followed by thoracic 12lumbar 5sacral 4—5 and coccygeal vertebrae 3—4.

The confusion about whether or not there are vertebrae stems from the fact that the two lowest vertebrae, the sacrum and the coccyx, are single bones made up of several smaller bones which have fused together.

So in the case of the human body arms and legs are appendages. In addition there are 14 facial bones which form the lower front part of the skull.

The Axial & Appendicular Skeleton

The human axial skeleton consists of 80 different bones. Cranium[ edit ] The human skull consists of the cranium and the facial bones. Examples of appendages include the limbs of vertebrates animals that have backbones e. The first rib is the shortest, broadest, flattest, and most curved.

Axial and Appendicular Skeleton diagram Axial and Appendicular Skeleton The human skeleton is divided into two main groups or categories of bones. Together the 22 bones that compose the skull form additional, smaller spaces besides the cranial vault, such as the cavities for the eyes, the internal ear, the nose, and the mouth.

See arm bones and hand bones. It is easy to remember how the axial skeleton and appendicular skeleton are classified by learning and remembering the meaning of the word appendage or appendages in the plural.

The rounded ends are attached at joints to the thoracic vertebrae at the back and the flattened ends come together at the sternum, in the front. The skullwhich contains 22 bones, from which 8 are cranial and 14 are facial.

The only bone that remains separate from the rest of the skull is the mandible. The axial and appendicular skeleton is shown in the diagram on the right. The sacral bone makes up the junction between the vertebral column and the pelvic bones.

The cranium is formed from eight plate-shaped bones which fit together at meeting points joints called sutures. It is the medial core of the body and connects the pelvis to the body, where the appendix skeleton attaches.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 bones, the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.

Structure and Function of Joints

The axial skeleton and the appendicular skeleton together form the complete skeleton. The axial skeleton transmits the weight from the head, the trunk, and the upper extremities down to the lower extremities at the hip joints, and is therefore responsible for the upright position of the human body.

The bones of the skeletal system can be grouped into two categories: the appendicular skeleton and the axial skeleton. The axial skeleton consists of the skull, hyoid bone, sternum, ribs, and vertebral column, including the sacrum and coccyx, forming the central, bony axis of the body.

While the axial skeleton makes up the inner framework or trunk of the body, the appendicular skeleton includes the outer limbs and the bones that connect the limbs to the center or trunk of the body.

The axial skeleton provides the framework for your skeleton.

Axial skeleton

It supports and protects the brain, the spinal cord and many of the internal organs. It supports and protects the brain, the spinal cord and many of the internal organs.

The axial and appendicular skeleton is shown in the diagram on the right.

The axial skeleton is shown in a bright yellow/green colour and the appendicular skeleton is shown in pink (or pale purple, depending on your display and settings).

Structure function of axial skeleton
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