Name: Date: Human Organ Systems 1. There are _____________ human organ systems in the body. 2. There are millions of _____________ in the human body. 3. Name all the human organ systems below. Name one important role for each organ system. 1. 2. 3. 4. 5. 6. 4. Arteries (vessels) typically carry blood ____________ from the heart. Veins carry blood _________ to the heart. 5. True or False. Your blood is blue in your body and turns red outside your body. _____________ 6. The ___________________ system is the largest organ which is your skin. Name: Date: Organs: Circulatory system Main Role: Organs: Digestive system Main Role: Organs: Endocrine system Integumentary system Main Role: Organs: Main Role: Organs: Immune system Main Role: Organs: Muscular system Main Role: Organs: Nervous system Main Role: Organs: Excretory system Main Role: Organs: Reproductive organ Reproductive system Main Role: Reproductive organ Organs: Respiratory system Main Role: Organs: Skeletal system Main Role: Name: Date: