Table of Contents
Whats is a muscle?
Muscle is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
What is muscle made of?
A muscle is made up of thousands of elastic fibres bundled tightly together. Each bundle is wrapped in a thin transparent membrane called a perimysium.
What is muscle and its function?
The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
What is muscle action?
The action of the muscle describes what happens when the more mobile bone is brought toward the more stable bone during a muscular contraction. Conventionally, the more stable bone and the more mobile bone are identified with the understanding that the body is in anatomical position.
How muscles are formed?
Muscle tissue is formed in the mesoderm layer of the embryo in response to signals from fibroblast growth factor, serum response factor, and calcium. In the presence of fibroblast growth factor, myoblasts fuse into multi-nucleated mytotubes, which form the basis of muscle tissue.
Why are muscles so important?
These muscles help you move, lift things, pump blood through your body, and even help you breathe. When you think about your muscles, you probably think most about the ones you can control. These are your voluntary (VOL-uhn-ter-ee) muscles, which means you can control their movements.
What are the muscles called?
These are your skeletal muscles — sometimes called striated (say: STRY-ay-tud) muscle because the light and dark parts of the muscle fibers make them look striped (striated is a fancy word meaning striped). Skeletal muscles are voluntary muscles, which means you can control what they do.
What is the muscle cell called?
myocyte
A muscle cell is also known as a myocyte when referring to either a cardiac muscle cell (cardiomyocyte), or a smooth muscle cell as these are both small cells. A skeletal muscle cell is long and threadlike with many nuclei and is called a muscle fiber.
What is the biggest muscle in the human body?
gluteus maximus
The gluteus maximus is the largest muscle in the human body. It is large and powerful because it has the job of keeping the trunk of the body in an erect posture. It is the chief antigravity muscle that aids in walking up stairs. The hardest working muscle is the heart.