1) When you inhale a) lungs take in oxygen b) lungs let out oxygen 2) What is the main function of the respiratory system? a) to bring oxygen to the body b) to provide oxygen and remove carbon dioxide from the body c) to break down food and absorb nutrients d) remove oxygen from the body and deliver carbon dioxide 3) What is the function of the dome-shaped diaphragm? a) This is where gas exchange occurs b) It attaches to the lungs to help breathing c) Air passes through the diaphragm on way to lungs d) It is under the lungs and keeps them from falling down to your stomach 4) When you exhale, your lungs are a) taking in air b) letting out air 5) What is asthma? a) A disorder of the lungs that causes the bronchi to become restricted (get smaller) so air can't get to the lungs b) When the bronchi expand and allow more air to get to the lungs c) a severe nasal infection d) a sore throat 6) The two main branches from the trachea (one to each lungs) is called a) capillaries b) bronchi c) alveoli d) bronchioles 7) The air sacs that are covered with capillaries where gas exchange takes place. a) bronchi b) oxygen c) lungs d) alveoli 8) The tube that is also known as your wind pipe. a) esophogus b) bronchi c) trachea d) alveoli 9) How many chambers does the heart have? a) 1 b) 2 c) 3 d) 4 10) The bottom chambers of the heart are called a) ventricles b) atria c) vena cava d) valves 11) What is the main function of the heart? a) Circulate blood and oxygen throughout the body b) The heart gets rid of the wastes in your body c) The heart is the control centers for all body activities 12) Red blood cells are produced in the... a) heart b) bone marrow c) muscles d) pancreas 13) What type of muscles do you find in the heart a) smooth muscle b) skeletal muscle c) cardiac muscle 14) What do red blood cells do? a) carry oxygen b) fight infection and disease c) produce carbon dioxide 15) Red blood cells transport ____________around our body a) bones b) plasma c) oxygen d) cardiac muscles 16) The circulatory system works with the ___________system to provide our body with oxygen a) respiratory b) muscular c) digestive d) skeletal 17) _____________ the smallest blood vessels a) Arteries b) veins c) capillaries 18) Carbon dioxide is considered a _______ a) food b) energy c) waste d) essential nutrient 19) Veins carry oxygen poor blood back to the heart a) false b) true 20) __________carry blood away from the heart to the various organs a) arteries b) capillaries c) veins 21) ____________very small tubes that connect arteries to veins; the smallest blood vessels a) veins b) arteries c) capillaries 22) What do arteries do? a) pumps blood to the heart b) pumps blood to and from the heart c) carries blood away from the heart d) help muscles contract 23) The main organ in the circulatory system a) vein b) heart c) lung d) aorta 24) What is the function of the heart a) to pump blood around the body b) to remove oxygen from the blood c) to breath d) to allow blood to flow through it

Respiratory/Circulatory System Grade 7

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