Other systems are also involved in carrying out movements, such as the nervous system. So, although the locomotor system is in perfect condition, it will always depend on the nerves and the brain, mainly, to be able to function.
Parts of the locomotor system
This apparatus includes bones, cartilage, and joints . The bones are responsible for shaping the body and providing us with a structure with which we can stand and other positions. In addition, they protect our organs and combine with muscles and joints to move us. An adult has 206 bones in all.
There are long, flat and short bones.
Long bones have several parts: diaphysis (in the middle), epiphysis (ends), metaphysis (junction between diaphysis and epiphysis), articular cartilage (covers the epiphysis), periosteum (surrounds the part of the bone that does not have cartilage), cavity medullary (inner part of the diaphysis that contains the bone marrow), endosteum (covers the medullary cavity).
The shorts have a cubic shape, although not so concrete, an example is the bones of the wrist. The flat bones are the ones that serve as a framework to protect the organs, such as the bones of the skull.
The main bones are:
The muscles are the active part of this system, since they are the ones that give rise to the movements, the ones that provide the energy that moves the bones, so to speak. Muscle tissue shrinks and stretches in favor of the movements we make.
The main muscles are:
- Femoral biceps
Tendons and joints are the tissue that connects bones to muscles. They are very resistant since they will be in charge of facilitating movement from birth until we die.
Importance of the muscular-skeletal system
The locomotor system allows us to perform from the simplest and most imperceptible movement to walking, mail or swimming . But this is not all, because, although there are people who are prevented from moving certain parts of their body, this structure still allows them to stay upright, to be able to sit; other poses and minimal movements.
Without this functional device, we would always be lying down, without the possibility of changing position.
Examples of diseases of the locomotor system
- Arthrosis . Similar to arthritis, but in this case there is a lack of elasticity in the joints, so they become stiffer each time.
- Arthritis . The joints become inflamed making movement difficult due to the stiffness caused by this disease. The patient suffers from pain, swelling and deformation of the limbs.
- Osteoporosis . The bones gradually lose calcium.
- Parkinson disease. It causes stiffness, tremors, or involuntary movements.
- Mal de San Vito. It causes involuntary movements, spasms, and grimaces. It originates from a mutation in a gene on chromosome 4.