Oncology & Cancer

New immune system understanding may help doctors target cancer

Your immune system's natural killer cells recognize and attack two major kinds of danger—cells infected by viruses and cells affected by cancer. When natural killer (NK) cells see a cancer cell, they kill it (naturally...). ...

Oncology & Cancer

New lipid signaling target may improve T cell immunotherapy

The immune system surveils our body looking for things that don't belong, often bacteria and viruses. While cancer cells are abnormal cells that undergo unregulated cell growth, they are good at evading detection by the immune ...

Medical research

New clues on stem cell transplant rejection revealed in study

In 2006, scientists discovered a way to "reprogram" mature cells—adult skin cells, for example—into stem cells that could, in principle, give rise to any tissue or organ in the body. Many assumed it was only a matter ...

Medical research

New pain organ discovered in the skin

Researchers at Karolinska Institutet in Sweden have discovered a new sensory organ that is able to detect painful mechanical damage, such as pricks and impacts. The discovery is being published in the journal Science.

Health

Hospital ratings systems get low grades from experts

Experts have turned the tables on hospital rating systems and graded the rating systems on their strengths and weaknesses. Most only got "C's" and "D's." The highest grade received was a "B" by U.S. News & World Report, according ...

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System

System (from Latin systēma, in turn from Greek σύστημα systēma) is a set of interacting or interdependent entities forming an integrated whole.

The concept of an 'integrated whole' can also be stated in terms of a system embodying a set of relationships which are differentiated from relationships of the set to other elements, and from relationships between an element of the set and elements not a part of the relational regime.

The scientific research field which is engaged in the study of the general properties of systems include systems theory, systems science, systemics and systems engineering. They investigate the abstract properties of the matter and organization, searching concepts and principles which are independent of the specific domain, substance, type, or temporal scales of existence.

Most systems share common characteristics, including:

The term system may also refer to a set of rules that governs behavior or structure.

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