Health

Vitamin D deficiency and poor muscle function in the over-60s

New research from Trinity College Dublin shows that vitamin D deficiency is an important determinant of poor skeletal muscle function in adults aged 60 years and over. Maintaining skeletal muscle function throughout life ...

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, ...

Cardiology

Deadly heart problem might not be so deadly

An incurable condition called hypertrophic cardiomyopathy may be less deadly than previously thought, according to a new study of sudden cardiac deaths among young people.

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.

Medical research

A higher resolution image of human lung development

The invention of interactive map applications has revolutionized wayfinding, providing an unprecedented level of information far beyond what printed road maps can offer. Researchers at Children's Hospital Los Angeles are ...

Medical research

Faulty signalling pathway linked to congenital heart condition

A congenital heart condition known as left ventricular non-compaction (LVNC), which occurs when muscly projections in the embryonic heart fail to transform into compact heart muscle, could be caused by signaling defects, ...

Sports medicine & Kinesiology

Rise in testosterone level boosts young women's running capacity

A rise in the level of the male hormone testosterone significantly boosts young physically active women's capacity to run for longer, reveals the first study of its kind, published online in the British Journal of Sports ...

Cardiology

Women get half the number of heart attack treatments as men

Women receive poorer heart attack treatment than men, even when rates of diagnosis are the same, according to new research funded by the British Heart Foundation (BHF) and published in the Journal of the American College ...

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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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