# 17 Which type of structure in the circulatory system prevents blood from going backwards ? Group of answer choices: 1) Septum 2) capillaries 3) valves 4) none of the choices are correct # 18 Which of the following measurements provides evidence of restriction of blood flow through blood vessels due to build up of cholesterol along the blood vessel wall or the bodies inability to regulate blood volume correctly? Group of answer choices: 1) resting heart rate 2) working cardio heart rate 3) Blood pressure 4) levels of sugar in the blood # 19 Which of the following organs of the digestive tract combines mechanical and chemical digestion of food molecules? Group of answer choices: 1) small intestine 2) large intestine 3) esophagus 4) mouth # 20 Which of the following measurements indicates the pressure exerted on the blood vessels when the heart is in contraction and the force is the greatest? Group of answer choices: 1) systole, the higher number 2) diastole, the lower number 3) resting heart rate 4) blood sugar level
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Step 1: The structure in the circulatory system that prevents blood from going backwards is the valves. Show more…
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