7.6 B physical and chemical changes Flashcards
Substances that provide nourishment essential for growth and the maintenance of life.
Nutrients
A change to a substance without forming a new substance, such as changing size or state of matter.
Physical Change
The basic structural and functional unit in living organisms.
Cell
The organ in the digestive system that churns food and mixes it with digestive juices
Stomach
Large complex molecules containing carbon, hydrogen, nitrogen, oxygen, and sometimes sulfur that break down to amino acids
Proteins
The group of organs that work together to break down food by physical and chemical processes into nutrients the body can use.
Digestive System
A clear liquid that moistens the mouth and starts the digestion of food.
Saliva
One of the nutrient-providing components of food; used as an energy source in the body, and found in butter, oils, nuts, meat, fish, and some dairy products
Lipids (fat)
The building blocks of the proteins in our bodies and the food we eat.
Amino Acids
A large mass of similar tissue that makes up a part of an organism that performs a specific function.
Organ
The building blocks of the fat in out bodies and in the food we eat.
Fatty Acids
A simple molecule with stored chemical energy; the product of photosynthesis and the building blocks of the carbohydrates in our bodies and in the food we eat.
Sugars (glucose)
A change that alters the identity of a substance, resulting in a new substance or substances with different properties.
Chemical Change
Molecules containing carbon, hydrogen, and oxygen that break down into simple sugars.
Carbohydrates
Chemicals secreted or released into the mouth, stomach, and intestines; responsible for aiding in the chemical break down of carbohydrates, proteins, and fats.
Digestive Juices
