7th Grade Science: Digestive System
Terms in this set (16)
the taking in of one substance by another, refers to the passage of nutrients and water through the walls of the small and large intestines.
chemical breakdown of nutrients through the action of enzymes and other substances.
a thick liquid of partially digested food produced by the stomach.
the breakdown of food into simpler components that can be absorbed and used by the body.
a group of organs that work together to break down and absorb nutrients from food, as well as eliminate the resulting wastes.
a molecule, usually a protein, which speeds up a chemical reaction.
plant material in food that is difficult to digest.
a unit used to measure the energy in foods.
physical breakdown of foods, including mechanical digestion (chewing in the mouth and churning in the
a substance that is used by the body for energy, growth, or other processes essential to life.
wavelike muscle contractions that push food through the digestive system.
tiny, finger-like projection in the wall of the small intestine where nutrients and water are absorbed
large muscular sac that continues the mechanical and chemical digestion of food
Digestive organ where most chemical digestion and absorption of food takes place
Digestive organ that absorbs water and forms feces
First digestive organ that initiates mechanical digestion and chemical digestion of carbohydrates
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