ALL ABOUT HUMAN!!

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Across
  1. 3. biological system consisting of specific organs and structures used for gas exchange in animals and plants.
  2. 5. a muscular organ, roughly the size of a fist, located in the center of the chest, slightly to the left, that acts as a pump for the circulatory system.
  3. 8. lowest part of the brainstem, connecting the brain to the spinal cord and controlling essential involuntary functions like breathing, heart rate, and blood pressure, as well as reflexes such as swallowing and coughing.
  4. 9. system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.
Down
  1. 1. system that breaks down food into nutrients for the body's energy, growth, and repair, and eliminates waste.
  2. 2. smaller and primarily responsible for coordinating voluntary muscle movements
  3. 4. largest part of the brain
  4. 6. a framework of bone or cartilage enclosing the brain of a vertebrate
  5. 7. the science that studies the structure of the body