Medical research

Researchers develop drug to rejuvenate muscle cells

Researchers from The University of Texas Medical Branch at Galveston have developed a promising drug that has proven to significantly increase muscle size, strength and metabolic state in aged mice, according to a study just ...

Cardiology

Finding suggests ways to promote adult heart tissue regeneration

Injured hearts do not heal themselves. Heart muscle cells, or cardiomyocytes, do not proliferate as much as necessary to replace dead tissue with new, pumping cells. Consequently, most people who had a severe heart attack ...

Health

Getting the most benefit from ab exercises

(HealthDay)—Men and women alike want defined abs. But you don't have to achieve a "six-pack"—the nickname for the three most visible pairs of abdominal muscles—to get the benefits of a stronger middle, needed to support ...

Health

Why static stretching may not be as effective as you think

The thing about professional football that renowned health-fad skeptic Timothy Caulfield finds most incredible isn't the feats of athleticism, the big hits or even the moments of grace that emerge from the chaos—it's the ...

page 1 from 23

Muscle

Muscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.

This text uses material from Wikipedia, licensed under CC BY-SA