Muscular System (introduction)

Skeletal system is generally known as the framework of our body allowing free movements from the joints. It also protects our vital organs from any danger. Without them, we may probably look like a flop of jelly and we can't do things that are very basic such as walking, eating, running, thinking, and etc. Speaking of movements, they would be impossible without the assistance of the muscular system.

The muscular system is the one that helps us run faster and can improve itself. And when I say improve itself meaning it can increase its performance better. Body building is one good example of how muscles themselves can improve. That is depending on how a person exercises and how often he/she regulates time of doing it.

Within this week, we discussed the basic parts of upper and lower muscles that help us do things basically such as chewing of food, leaping, lifting, and etc. Notice as you go to a gym there are labels nowadays containing the parts of the muscles. Deltoid, gastroecmius, bicep, tricep, femoral bicep, and etc. are the common terms that biologists and atheletes use. Well, how do muscles move and contract? It's simple. Each muscle fibers contain sacromeres which serve as functional units of gears in a motor.

After the presentation discussed by our teacher, I have come to the conclusion that muscles are very significant in moving our body and mainting our weight. For without them, we will probably look like a statue staying there until forever like a stone as well!

Here are some of the terms of muscular movement :

*Agonists - primary movers
*Point of origin - muscle ends attached to the stationary bones
*Point of insertion - muscle ends attached to the moving bones
*Synergistic - assists in movement
*Antagonists - muslce movement in an opposite direction towards its reference
*Rotation - circular movement of the muscles
*Abduction - away from the midline of the body
*Adduction - towards the midline of the body
*Extension - increasing angle between two bones in a joint
*Flexion - decreasing angle between two bones in a joint
*Extensor - straightens a joint
*Flexor - bends a joint

Tissues

The skeletal system won't work without tissues. Tissues are the ones helping bones to attach one another. Four types of tissues involved in the skeletal system are epithelial, connective, nervous, and muscular. Ligaments and tendons are also considered to be connected to the skeletal system. However, tendons attach muscles to bones while ligaments attach bones to bones.