Respiratory		Works with the excretory system to take in materials your body needs and to get rid of wastes
Digestive		Protects your body from disease by providing a barrier to viruses and bacteria; protects your body from physical damage, and from dehydration, overheating, or freezing
Circulatory		Controls and coordinates your body's activities and helps you sense and respond to changes in your environment
Excretory		Allows movement...the bones and joints of the skeletal system must work with it
Muscular		regulates body activities by producing chemical messengers in glands
Nervous		made up of special cells, proteins, tissues, and organs... defends people against germs and microorganisms (bacteria, viruses, and fungi)
Skeletal		produces sperm in males; produces eggs in females
Endocrine		Gets oxygen into the body and rids the body of carbon dioxide
Immune		removes wastes produced by the activities of cells
Integumentary		transports needed substances throughout your body and carries away wastes
Reproductive		Supports your body and gives it shape; protects your internal organs; provides a scaffolding for muscles (allowing you to move); stores minerals and makes blood cells