1) The ......... is the largest bone in the body. a) tibia b) femur c) ulna 2) An organ found in the circulatory system is ......... a) uterus b) stomach c) heart 3) The main organ in the respiratory system is the ____________. a) lungs b) diaphragm c) nose 4) Which of the following organ does not belong to the reproductive system? a) ovary b) penis c) trachea 5) Only blood is circulated through the body. a) true b) false 6) The heart is the main organ in the circulatory system. a) true b) false 7) Blood can be oxygen rich or oxygen poor. a) true b) false 8) The rib cage protects the_________ a) brain b) heart c) femur 9) Which organ system works with all five senses to adjust to our environment? a) Skeletal b) Respiratory c) Nervous 10) The human body is made up of ____________ bone? a) 208 b) 206 c) 302

Organ systems

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