Organ Systems Vocabulary

Question 1

When Maya checks a diagram of her circulatory system, she reads several statements about arteries and veins. Which statement correctly tells (1) the direction each vessel carries blood relative to the heart and (2) one structural feature that matches that function?

Accepted Answer

Arteries carry blood away from the heart and have thick, muscular walls to handle high pressure; veins carry blood toward the heart, have thinner walls, and contain valves that stop backflow.

Answer

Arteries carry blood toward the heart and have thin walls; veins carry blood away from the heart and have thick walls with no valves.

Answer

Both arteries and veins carry blood away from the heart, but arteries have valves while veins have thicker walls.

Answer

Arteries always carry oxygen‑rich blood and veins always carry oxygen‑poor blood, and both have the same wall thickness.

Question 2

Which sentence correctly describes the role of the circulatory, digestive, and respiratory systems?

Accepted Answer

The circulatory system carries blood throughout the body, the digestive system breaks down food into nutrients, and the respiratory system takes in oxygen and releases carbon dioxide.

Answer

The circulatory system breaks down food into nutrients, the digestive system moves blood to all parts of the body, and the respiratory system removes carbon dioxide from the bloodstream.

Answer

The circulatory system sends oxygen directly to the lungs, the digestive system turns food into energy, and the respiratory system moves blood to the muscles.

Answer

The circulatory system filters waste from the blood, the digestive system supplies oxygen to cells, and the respiratory system helps the heart beat.

Question 3

Which statement best explains the difference between an artery and a vein?

Accepted Answer

Arteries carry blood away from the heart and have thick, muscular walls; veins carry blood toward the heart, have thinner walls, and contain valves that stop the blood from flowing backward.

Answer

Arteries carry blood toward the heart and have thin walls; veins carry blood away from the heart and have thick walls with no valves.

Answer

Arteries and veins are the same except arteries carry only oxygen and veins carry only carbon dioxide.

Answer

Arteries have valves that keep blood moving, while veins have no valves and rely on muscle pressure.

Try three questions

When Maya checks a diagram of her circulatory system, she reads several statements about arteries and veins. Which statement correctly tells (1) the direction each vessel carries blood relative to the heart and (2) one structural feature that matches that function?

Which sentence correctly describes the role of the circulatory, digestive, and respiratory systems?

Which statement best explains the difference between an artery and a vein?

Keep going on this shelf