Muscular and respiratory
Nervous and integumentary
Skeletal and muscular
Respiratory and digestive
Muscular and digestive
Endocrine and circulatory
Digestive and circulatory
Excretory and circulatory
Digestive and excretory
Respiratory and circulatory
Muscular and circulatory
Immune and integumentary
Skeletal and circulatory
Muscular and nervous
Endocrine and reproductive
Act together to bring in and distribute oxygen to the cells
Act as the body's two defense systems for foreign pathogens
Work together to pick up and filter nitrogen-containing waste from the body
One system produces specialized cells that are used by the other system to distribute oxygen through the body
Work together to produce and transport hormones to organs and tissues
Work together to provide the movement of blood throughout the body
Metabolic wastes are eliminated by these two systems
Together allow you to look around you and see the world
Work together by moving air in and out of the lungs
Work together to produce secondary sex characteristics (hair in males or wider hips in females)
Work together as your skin senses the outside world
Work together in breakdown and movement of food though the gastrointestinal tract
When in contact with the external environment, these systems take in nutrients and oxygen
Act together to break down and distribute nutrients to the cells
Work together to facilitate movement and locomotion