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 reaction

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

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

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.

circulatory 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

The simplest level of organizations in humans;

cells

system

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

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

works with digestive system to transport nutrients

circulatory system