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The Circulatory System Flocabulary Quiz Answers Key

Q1 The human body contains ________ of cells.
  1. thousands
  2. millions
  3. billions
  4. trillions
Q2 Which of these best describes circulation?
  1. the process by which food is turned into energy
  2. the flow of blood throughout the body
  3. the strength of muscles and bones
  4. Dthe ability to think and dream
Q3The main organ of the circulatory system is the
  1. liver.
  2. brain.
  3. heart.
  4. spleen.
Q4 The heart is about the size of a
  1. fist.
  2. quarter.
  3. football.
  4. ring finger.
Q5Which of these is true?
  1. Both veins and arteries carry oxygen-rich blood.
  2. Both veins and arteries carry oxygen-poor blood.
  3. Veins carry oxygen-poor blood, and arteries carry oxygen-rich blood.
  4. Veins carry oxygen-rich blood, and arteries carry oxygen-poor blood.
Q6 Plasma is
  1. the clear liquid part of blood.
  2. the compound that makes blood red.
  3. a type of blood cell that fights infection.
  4. a type of blood cell that carries carbon dioxide.
Q7What is the function of platelets?
  1. They reduce pain and inflammation.
  2. They kill bacteria in the blood.
  3. They give you energy.
  4. They help blood clot.
Q8 Red blood cells carry ________ around the body.
  1. platelets
  2. oxygen
  3. aortas
  4. veins
Q9 The human heart beats about ________ times a day.
  1. 1,000
  2. 10,000
  3. 100,000
  4. 1,000,000
Q10 What is homeostasis?
  1. a state of balance in the body
  2. a way to measure physical fitness
  3. the amount of oxygen in the blood
  4. the number of times the heart beats

The Circulatory System Flocabulary Read & Respond Answers

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Q1 Which of these is true of blood?
  1. Blood is transported through veins only.
  2. Blood brings oxygen and nutrients to cells.
  3. Blood carries carbon dioxide to cells for energy.
  4. Blood collects capillaries from cells around the body.
Q2 Based on the passage, which of these is most likely true?
  1. The heart beats once per hour.
  2. The heart has eight separate chambers.
  3. CBlood circulates through the body in one direction.
  4. The human body contains about 2,000 gallons of blood.
Q3 Which of these is a difference between veins and arteries?
  1. Arteries carry blood, and veins do not.
  2. Veins carry oxygen, and arteries do not.
  3. Arteries flow toward the heart, and veins flow away from the heart.
  4. Veins flow toward the heart, and arteries flow away from the heart.
Q4 Which formed element in blood is responsible for destroying bacteria and viruses?
  1. plasma
  2. platelets
  3. red blood cells
  4. white blood cells
Q5Which of the following best describes homeostasis?
  1. resistant
  2. strenuous
  3. involuntary
  4. imbalanced

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Jennifer Kelly is an experienced educator with a passion for empowering students to achieve academic success. With over 12 years of teaching experience, Jennifer has worked with students at all levels, ranging from elementary to high school. Her dedication to helping students excel in their studies led her to create the educational blog Answer Mentor.

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