1.Skeletal System: Many humans are born with more than 270 bones. 2.Integumentary System: An organ system that protect the body from damages. 3.Muscular System: Organ system consisting of skeletal,smooth & cardiac muscles. 4.Excretory System: Controls the blood volume by removing water that's produced by blood cells. 5.Endocrine System: Is like an informational signal like the nervous system. 6.Reproductive System: System of organs which work together for reproduction. 7.Respiratory System: Made up of structures and organs that help move oxygen into & out the lungs. 8.Circulatory System: An organ system that keeps blood & lymph circulation from transporting nutrients. 9.Digestive System: Our digestive system has the digestive tract & the accessory organs. 10.Nervous System: Each day every one of us is bombarded by thousands of stimuli.