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1.92 billion / 24% (2021) [2] Anemia or anaemia ( British English ) is a blood disorder in which the blood has a reduced ability to carry oxygen . This can be due to a lower than normal number of red blood cells , a reduction in the amount of hemoglobin available for oxygen transport, or abnormalities in hemoglobin that impair its function.
The free radical theory of aging states that organisms age because cells accumulate free radical damage over time. [1] A free radical is any atom or molecule that has a single unpaired electron in an outer shell. [2] While a few free radicals such as melanin are not chemically reactive, most biologically relevant free radicals are highly ...
Fantastic Voyage: Live Long Enough to Live Forever. The 10% Solution for a Healthy Life (ISBN 0-517-88301-5, paperback, 1993) is a health book written by computer scientist Ray Kurzweil and published in 1993. In the book, he explains to readers "How to Reduce Fat in Your Diet and Eliminate Virtually All Risk of Heart Disease and Cancer ".
Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". [1][2] Analyzing the determinants of health of a population and the threats it faces is the basis for public health. [3]
The cannabinoid receptor type 1 (CB1), located at the presynaptic neuron, is a receptor that can stop stressful neurotransmitter release to the postsynaptic neuron; it is activated by endocannabinoids (ECs) such as anandamide (N-arachidonoylethanolamide; AEA) and 2-arachidonoylglycerol (2-AG) via a retrograde signaling process in which these ...
Health. Health has a variety of definitions, which have been used for different purposes over time. In general, it refers to physical and emotional well-being, especially that associated with normal functioning of the human body, absent of disease, pain (including mental pain), or injury. Health can be promoted by encouraging healthful ...
Glucose is a monosaccharide containing six carbon atoms and an aldehyde group, and is therefore an aldohexose. The glucose molecule can exist in an open-chain (acyclic) as well as ring (cyclic) form. Glucose is naturally occurring and is found in its free state in fruits and other parts of plants.
Photosynthesis (/ ˌfoʊtəˈsɪnθəsɪs / FOH-tə-SINTH-ə-sis) [1] is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism.