Vitamins
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  Vitamins



Vitamins

    Any of a number of complex organic substances found in foods that are essential for normal body functioning.

RELATED TERMS
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Organic
Of or related to a substance that contains carbon atoms linked together by carbon-carbon bonds. All living matter is organic. The original definition of the term organic related to the source of chemical compounds, with organic compounds being those carbon-containing compounds obtained from plant or animal sources, whereas inorganic compounds were obtained from mineral sources. Compounds containing bonds between carbon atoms can now be made in the laboratory and industrially by man.

Foods
Anything which, when taken into the body, serves to nourish or build up the tissues or to supply body heat. (Dorland, 27th ed)

Essential
1. Something that cannot be done without. 2. Required in the diet, because the body cannot make it. As in an essential amino acid or an essential fatty acid. 3. Idiopathic. As in essential hypertension.



SIMILAR TERMS
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Vital force (bioenergy, cosmic energy, cosmic energy force, cosmic force, cosmic life energy, cosmic
An alleged nonmaterial "force" that sustains life.

Vitamin
Any of many organic substances that are vital in small amounts to the normal functioning of the body. Vitamins are found in food, produced by the body, and manufactured synthetically; along with minerals, they are known as micronutrients.

Vitamin A
Vitamin A is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): vitamin A.

Vitamin A palmitate
Vitamin A palmitate is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): vitamin A palmitate.

Vitamin A solubilized
Vitamin A solubilized is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): vitamin A palmitate.

Vitamin D
Vitamin D is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ergocalciferol.

Vitamin k1
Vitamin k1 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): phytonadione.

Vitaped
Vitaped is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ascorbic acid; biotin; cyanocobalamin; ergocalciferol; folic acid; niacinamide; pantothenic acid; phytonadione; pyridoxine; riboflavin; thiamine; vitamin A palmitate; vitamin E.



PREVIOUS AND NEXT TERMS
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Vegetarian
A vegetarian diet excludes meats, such as beef, turkey, and pork, but includes dairy products.

Ventilator
A machine used to help a person breathe. Also called a respirator, a ventilator can assist with breathing or breathe entirely for a patient.

Vernix caseosa
This cheesy or waxy substance that coats the fetus in the uterus is believed to protect the skin from exposure to amniotic fluid. Premature babies will be covered with a lot of vernix caseosa, while post-term babies will have almost none.

Very low birth weight
A baby weighing less than 3.3 pounds at birth is considered very low birthweight, and has a much higher risk of illness.

Viable
Capable of living outside the womb.

Vitamins

Ventral pathway
One of two theorized systems of visual information processing. Information though to progress toward the temporal cortex V1-> V2 -> V4 -> IT. Functions for analysis of object qualities such as pattern shapes, size and colors.

Vieth-Muller circle
When the foveal centers are pointed at an object, the range for which images of all other objects fall on corresponding points of zero horizontal disparity. This differs from the perceived range of zero disparity, the Horopter.

Viewer centered coordinate system
The projection of an objects shape on the retina depends on the vantage point of the viewer.

Visual angle
A measurement of the area of the retina in degrees subtended by a stimulus. Roughly speaking the width of one's thumb at arm's length is approximately 2 degrees.

Visual phosphene
The visual perception resulting from non-photopic stimulation such as electrical stimulation of the cortex or pressing on the eyeball. Brinkdley & Lewin 1968) and Bak et al (1990) have shown that stimulation of the cortex produces visual pherceptions.

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