Skeletal System
Introduction to Human Skeletal System:
Skeletal system is the system of bones, associated cartilages and joints of human body. Together these structures form the human skeleton. Skeleton can be defined as the hard framework of human body around which the entire body is built. Almost all the hard parts of human body are components of human skeletal system. Joints are very important because they make the hard and rigid skeleton allow different types of movements at different locations. If the skeleton were without joints, no movement would have taken place and the significance of human body; no more than a stone.
BONE
What is a bone?
Bone is a dense type of connective tissue impregnated with inorganic salts mainly the salts of calcium such as calcium phosphate, calcium carbonate etc. The organic portion of the bone constitutes one third (1/3) and the inorganic salt component constitutes two third (2/3). The inorganic salts are mainly responsible for rigidity and hardness, which make bone resist compression caused by the forces of weight and impact. The organic connective tissue portion of the bone makes it resilient and thus the bone can afford resistance to tensile forces. In strength bone is comparable to iron and steel.
Bone forms an important component of the skeleton of human body. Because of its rigidity and hardness, it provides the strength and form necessary to keep human body in its shape. It also protects the delicate organs vital for life, for example the skull protects the brain and the ribcage protects heart and lungs.
Types of bones:
The detail of different types of bones is a huge topic and that is why it could not be explained here. Please visit “Types of bones” for studying complete classification.
Basic Structure of an adult long bone:
A typical long bone of adult human beings consists of the following important parts.
Shaft:
It is the long middle part of an adult human long bone. It is composed of periosteum, cortex and a medullary
Skeletal system is the system of bones, associated cartilages and joints of human body. Together these structures form the human skeleton. Skeleton can be defined as the hard framework of human body around which the entire body is built. Almost all the hard parts of human body are components of human skeletal system. Joints are very important because they make the hard and rigid skeleton allow different types of movements at different locations. If the skeleton were without joints, no movement would have taken place and the significance of human body; no more than a stone.
BONE
What is a bone?
Bone is a dense type of connective tissue impregnated with inorganic salts mainly the salts of calcium such as calcium phosphate, calcium carbonate etc. The organic portion of the bone constitutes one third (1/3) and the inorganic salt component constitutes two third (2/3). The inorganic salts are mainly responsible for rigidity and hardness, which make bone resist compression caused by the forces of weight and impact. The organic connective tissue portion of the bone makes it resilient and thus the bone can afford resistance to tensile forces. In strength bone is comparable to iron and steel.
Bone forms an important component of the skeleton of human body. Because of its rigidity and hardness, it provides the strength and form necessary to keep human body in its shape. It also protects the delicate organs vital for life, for example the skull protects the brain and the ribcage protects heart and lungs.
Types of bones:
The detail of different types of bones is a huge topic and that is why it could not be explained here. Please visit “Types of bones” for studying complete classification.
Basic Structure of an adult long bone:
A typical long bone of adult human beings consists of the following important parts.
Shaft:
It is the long middle part of an adult human long bone. It is composed of periosteum, cortex and a medullary