Medical research

WFIRM scientists push bioprinting capability forward

Wake Forest Institute for Regenerative Medicine (WFIRM) scientists are the first to report using bioprinting to print a tracheal tissue construct comprised of multiple different functional materials. They printed different ...

Medical research

Tendon stem cells could revolutionize injury recovery

The buildup of scar tissue makes recovery from torn rotator cuffs, jumper's knee, and other tendon injuries a painful, challenging process, often leading to secondary tendon ruptures. New research led by Carnegie's Chen-Ming ...

Medical research

Fixing muscle and the brain

With the number of times the word "gel" comes up in the research of Nenad Bursac and Tatiana Segura, one would be forgiven for thinking they might work in the haircare or running shoe industries. Their gels, however, are ...

Medical research

Here's something that will raise your blood pressure

Many questions remain about the mechanisms that control blood pressure, particularly in relation to hypertension. Among the factors involved in regulation of blood vessel behavior, the apelin receptor (APJ) has been presumed ...

Cardiology

A kinase identified as possible target to treat heart failure

An unexplored kinase in heart muscle cells may be a good target to treat heart failure, a disease that is only incrementally delayed by existing therapies. Failing human hearts showed reduced amounts of this kinase, and preclinical ...

Cardiology

Mending broken hearts with neural crest cells

Zebrafish—striped fish a few centimeters long—have the ability to regrow up to 20 percent of their hearts after sustaining major damage. Now, Caltech scientists have discovered that embryonic cells from the hindbrain, ...

Medical research

Study sheds new light on the growth of bladder cancer

New Curtin University-led research has discovered that using drugs to target a pathway in the body that causes cancerous cells to spread aggressively may help to reduce the severity of bladder cancer.

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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.

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