Knowledge is the key to immortality
|Prepared by - Dr. Rakhal Debnath - Associate Professor - Zoology|
Today’s Learning Learning Objectives
4th Sem (Hons) Paper-8
By the end of today’s PPT presentation in Class at 12.00 Noon, you will be able to:
• Discuss the functions of the skeletal system
• Distinguish between the axial skeleton and appendicular skeleton
• Define the axial skeleton and its components
• Define the appendicular skeleton and its components
The skeletal system includes all of the bones, cartilages, and ligaments of the body that support and give shape to the body and body structures. The skeleton consists of the bones of the body. For adults, there are 206 bones in the skeleton. Younger individuals have higher numbers of bones because some bones fuse together during childhood and adolescence to form an adult bone. The primary functions of the skeleton are to provide a rigid, internal structure that can support the weight of the body against the force of gravity, and to provide a structure upon which muscles can act to produce movements of the body. The lower portion of the skeleton is specialized for stability during walking or running. In contrast, the upper skeleton has greater mobility and ranges of motion, features that allow you to lift and carry objects or turn your head and trunk.
In addition to providing for support and movements of the body, the skeleton has protective and storage functions. It protects the internal organs, including the brain, spinal cord, heart, lungs, and pelvic organs. The bones of the skeleton serve as the primary storage site for important minerals such as calcium and phosphate. The bone marrow found within bones stores fat and houses the blood-cell producing tissue of the body.
The skeleton is subdivided into two major divisions—the axial and appendicular.
Dr. R. Debnath
Note: Text in parts have been adopted from website sources.
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