OpenSciEd 7.3 Metabolic Reactions

amino acids

building blocks of proteins

carbohydrate

compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body

cellular respiration

the process by which cells use oxygen to produce energy from food

chemical digestion

Process by which enzymes break down food into small molecules that the body can use

chemical reaction

process that changes one set of chemicals into another set of chemicals

Combustion

the process of burning something

diagnosis

Identification of an injury or disease

Esophagus

A muscular tube that connects the mouth to the stomach.

fatigue

Extreme tiredness, exhaustion

fatty acids

unbranched carbon chains that make up most lipids

Glucose

the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.

large intestine

The last section of the digestive system, where water is absorbed from food and the remaining material is eliminated from the body

mechanical digestion

physical breakdown of food

Metabolism

All of the chemical reactions that occur within an organism

product

A substance produced in a chemical reaction

Protien

a class of nutients that builds body tissues and supplies energy. Protien is made of amino acids.

Reactant

A chemical substance that is present at the start of a chemical reaction

stomach

large muscular sac that continues the mechanical and chemical digestion of food

small intestine

The part of the digestive system in which most chemical digestion takes place.

nerve cells

fast cell communication, sends impulses through nervous system

circulatory system

(aka cardiovascular system) This system works as the transportation highway for the body. It consists of the heart, blood, and blood vessels. It transports substances such as oxygen, carbon dioxide, and nutrients in the body.

living things levels of organization

cells, tissues, organs, organ system

Organ

a structure composed of two or more tissue types that performs a specific function for the body

cells

The simplist level of organizations in humans;

system

set of organs tat work together to perform a specific function.

physcial change

Teeth chewing food into smaller digestible pieces is known as

enzymes

which example shows a chemical change to food during digestion?

mechanical digestion

by teeth

Lungs

Main organs of the respiratory system-balloons inflating or deflating can model this

nervous system

main organ-brain, regulates other systems

circulatory system

main organ-heart

respiratory system

main organ-lungs, supplies blood with oxygen

System

group of interdependent organs with similar functions

tissue

group of cells with similar structure or function

organ

group of tissues that work together to perform closely related functions

cell

structure and functional unit of all living things

circulatory system

works with digestive system to transport nutrients