Bones and Muscles
We refer to the bones and muscles as to the most important compound parts of skeletal and muscular systems. Because of these body parts being such organs like heart, liver and kidneys, we can talk about their anatomical structure, their functions and their pathology.
In the first place, the structure of a bone and a muscle appears a thing to be talked about. A bone is known to consist of cartilage cells, bones cells, fibrous connective tissue, blood vessels and nerves. Needless to say, the most typical long bones have two ends and a slender shaft between them. The inner space is just big enough for the red and yellow marrow to go in it. The first ones are considered especially important for the production of the RBC. It also needs to be mentioned that chemically the bone is composed of organic materials, giving elasticity and flexibility,and inorganic materials, making the bones hard and strong. That‘s why the bone needs a constant supply of minerals, vitamins and hormones in order to keep the balance between those two parts.
As far as the bone composition is discussed, the structure of a muscle is also important. Why not look at it more carefully? At first look, one can find out the muscles to be striated. Also muscles consist of a large number of microscopic myofibriles, which could be easily seen while investigating muscle with a microscope. The myofibriles are joined together by a connective tissue. An abundant supply of oxygen and nutrients as well as the link between the CNS and the muscle is ensured by the blood vessels and nerves, penetrating the muscle structure. To give more details, a place where muscle joins with a bone is known to be a tendon. Moreover, it needs to be said that bones articulate at joints, which can be of many various shapes and structures and which gives a greater freedom of movement.