News tagged with human heart
Researchers create first human heart cells that can be paced with light
In a compact lab space at Stanford University, Oscar Abilez, MD, trains a microscope on a small collection of cells in a petri dish. A video recorder projects what the microscope sees on a nearby monitor. The cells in the ...
Sep 20, 2011 |
4.8 / 5 (6) |
0
|
Why humans outlive apes
The same evolutionary genetic advantages that have helped increase human lifespans also make us uniquely susceptible to diseases of aging such as cancer, heart disease and dementia, reveals a study to be published in a special ...
Jan 26, 2010 |
4.6 / 5 (11) |
2
|
Jumping genes, gene loss and genome dark matter
In research published today by Nature, an international team describes the finest map of changes to the structure of human genomes and a resource they have developed for researchers worldwide to look at the ...
Oct 07, 2009 |
4.8 / 5 (5) |
1
Most babies born this century will live to 100
(AP) -- Most babies born in rich countries this century will eventually make it to their 100th birthday, new research says. Danish experts say that since the 20th century, people in developed countries are living about three ...
Oct 01, 2009 |
4.4 / 5 (14) |
3
Pivotal role for proteins -- from helping turn carbs into energy to causing devastating disease
Research into how carbohydrates are converted into energy has led to a surprising discovery with implications for the treatment of a perplexing and potentially fatal neuromuscular disorder and possibly even cancer and heart ...
May 24, 2012 |
5 / 5 (1) |
0
|
Scientists solve a mystery of bacterial growth and resistance
Scientists at The Scripps Research Institute have unraveled a complex chemical pathway that enables bacteria to form clusters called biofilms. Such improved understanding might eventually aid the development ...
Apr 26, 2012 |
4.5 / 5 (2) |
0
|
Nanofiber breakthrough holds promise for medicine and microprocessors
(PhysOrg.com) -- A new method for creating nanofibers made of proteins, developed by researchers at Polytechnic Institute of New York University (NYU-Poly), promises to greatly improve drug delivery methods ...
Nanotechnology / Nanomaterials
Feb 29, 2012 |
5 / 5 (6) |
0
|
Scientists use silk from the tasar silkworm as a scaffold for heart tissue
(PhysOrg.com) -- Damaged human heart muscle cannot be regenerated. Scar tissue grows in place of the damaged muscle cells. Scientists from the Max Planck Institute for Heart and Lung Research in Bad Nauheim ...
Jan 30, 2012 |
not rated yet |
0
|
Cardiac cells might help fix heart attack damage
(AP) -- Scientists say they've found cells in the hearts of mice that can make new muscle after a heart attack, raising hopes that doctors can one day help the human heart repair itself.
Medicine & Health / Medical research
Jun 08, 2011 |
3 / 5 (1) |
0
Scientists identify 95 genetic variants associated with cholesterol, triglycerides
A global team of researchers co-led by the University of Michigan School of Public Health has discovered or confirmed 95 regions of the human genome where genetic variants are associated with blood cholesterol and triglyceride ...
Aug 04, 2010 |
not rated yet |
0
|
Turning back the cellular clock
Cell reprogramming calls The Curious Case of Benjamin Button to mind.
Jun 29, 2010 |
4.7 / 5 (6) |
0
|
WISE Telescope has Heart and Soul
(PhysOrg.com) -- NASA's Wide-field Infrared Survey Explorer, or WISE, has captured a huge mosaic of two bubbling clouds in space, known as the Heart and Soul nebulae. The space telescope, which has completed ...
May 24, 2010 |
4.9 / 5 (7) |
0
|
Want to live well? Harvard experts offer pragmatic pointers on getting healthy and staying there
You are what you eat. You're also how you feel, how you exercise, how you sleep, how you handle money, how you relate to people, and what you value.
Dec 17, 2009 |
3.7 / 5 (14) |
3
Why we outlive our ape ancestors
In spite of their genetic similarity to humans, chimpanzees and great apes have maximum lifespans that rarely exceed 50 years. The difference, explains USC Davis School of Gerontology Professor Caleb Finch, is that as humans ...
Medicine & Health / Medical research
Dec 02, 2009 |
4 / 5 (5) |
0
Human cardiac master stem cells identified
(PhysOrg.com) -- Harvard Stem Cell Institute researchers at Massachusetts General Hospital have identified the earliest master human heart stem cell from human embryonic stem cells - ISL1+ progenitors - that ...
Medicine & Health / Medical research
Jul 01, 2009 |
5 / 5 (4) |
0
Human heart
The human heart provides a continuous blood circulation through the cardiac cycle and is one of the most vital organs in the human body. It is divided into four chambers: the two upper chambers are called the left and right atria and two lower chambers are called the right and left ventricles. Normally the right ventricle pumps the same blood amount into the lungs with each bit that the left ventricle pumps out. Physicians commonly refer to the right atrium and right ventricle together as the right heart and to the left atrium and ventricle as the left heart.
The electric energy that stimulates the heart occurs in the sinoatrial node, which produces a definite potential and then discharges, sending an impulse across the atria. The Purkinje fibers transmit the electric charge to the myocardium while the cells of the atrial walls transmit it from cell to cell, making the atrial syncytium.
The human heart and its disorders (cardiopathies) are studied primarily by cardiology.
For more information about Human heart, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
