an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
Medical Definition of Cardiac output. Cardiac output: The amount of blood the heart pumps through the circulatory system in a minute. The amount of blood put out by the left ventricle of the heart in one contraction is called the stroke volume. The stroke volume and the heart rate determine the cardiac output.
a substance that provides nourishment essential for growth and the maintenance of life.
Reaction time is the amount of time it takes to respond to a stimulus. An example of reaction time is when a bug stings within 1 second of being approached.
the energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).
In physical fitness, body composition is used to describe the percentages of fat, bone, water and muscle in human bodies. Because muscular tissue takes up less space in the body than fat tissue, body composition, as well as weight, determines leanness.
Medical Definition of communicable disease. : an infectious disease transmissible(as from person to person) by direct contact with an affected individual or the individual's discharges or by indirect means (as by a vector) — compare contagious disease.
the chemical processes that occur within a living organism in order to maintain life.
a solid inorganic substance of natural occurrence.
any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, collagen, etc., and as enzymes and antibodies.
the ability to do something or act in a particular way, especially as a faculty or quality.
an abnormally high body temperature, usually accompanied by shivering, headache, and in severe instances, delirium.
an even distribution of weight enabling someone or something to remain upright and steady.
the rate at which someone or something is able to move or operate.
high-density lipoprotein.
a natural oily or greasy substance occurring in animal bodies, especially when deposited as a layer under the skin or around certain organs.