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Vocab. Words

Autotroph an organism that is able to form nutritional organic substances
Heterotroph an organism deriving its nutritional requirements from complex organic substances.
Chemoautotroph an organism, typically a bacterium, that derives energy inorganic compounds.
Photoautotroph are organisms that carry out photosynthesis.
Calories units use for food
Energy Energy exists in different forms but is neither created nor destroyed; it simply converts to another form
Ingestion the process of taking food, drink, or another substance into the body by swallowing or absorbing it.
Digestion the process of breaking down food by mechanical energy
Egestion is the discharge or expulsion of undigested material (food) from a cell in case of unicellular organisms,
cellulose is the main constituent of plant cell walls and of vegetable fibers such as cotton
Body mass index a weight-to-height ratio, calculated by dividing one's weight in kilograms by the square of one's height in meters and used as an indicator of obesity and underweight.
Absorption the process or action by which one thing absorbs or is absorbed by another.
Diffusion the intermingling of substances by the natural movement of their particles.
Villi A small projection on the surface of a mucous membrane, such as that of the small intestine
Constipation Causes of constipation. Constipation happens when the colon absorbs too much water; this can occur if the muscles in the colon are contracting slowly or poorly, causing the stool to move too slowly and lose more water.
Enzyme catalysts are substances that increase the rate of chemical reactions without being used up.
Macromolecules A large complex molecule, such as nucleic acids, proteins, carbohydrates, and lipids, with relatively large molecular weight
Bulimia An eating disorder characterized by episodes of secretive excessive eating (binge-eating) followed by inappropriate methods of weight control, such as self-induced vomiting (purging), abuse of laxatives and diuretics, or excessive exercise.
Anorexia : An eating disorder characterized by markedly reduced appetite or total aversion to food.
Created by: Darylen