Circulatory System Trivia With Answers

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| By Knoelking1993
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Knoelking1993
Community Contributor
Quizzes Created: 1 | Total Attempts: 122,785
Questions: 20 | Viewed: 122,795

1.

The circulatory system is composed of:

Answer: The heart, blood, and blood vessels.
Explanation:
The circulatory system is responsible for transporting blood, oxygen, nutrients, and hormones to the body's cells and removing waste products. The heart acts as a pump, continuously pumping blood through the blood vessels. Blood carries oxygen and nutrients to the cells and removes waste products. Blood vessels, including arteries, veins, and capillaries, serve as the pathways through which blood flows. Therefore, the correct answer is the heart, blood, and blood vessels, as they are the main components of the circulatory system.
2.

The heart is located near the center of your:

Answer: Chest
Explanation:
The heart is located near the center of your chest. It is positioned slightly to the left side of your chest, behind the sternum (breastbone) and between the two lungs. This location allows the heart to efficiently pump oxygenated blood to the rest of the body.
3.

The heart is about the size of your:

Answer: Fist
Explanation:
The heart is a muscular organ that is roughly the same size and shape as a closed fist. It is located in the chest, slightly to the left of the center of the body. The comparison to a fist helps to give a visual representation of the approximate size of the heart.
4.

What divides the right side of the heart from the left side?

Answer: Septum
Explanation:
The septum is a wall that separates the left side of the heart from the right side. It prevents the mixing of oxygenated and deoxygenated blood, ensuring that oxygen-rich blood is pumped to the body while deoxygenated blood is sent to the lungs for oxygenation.
5.

How many chambers does the human heart have?

Answer: 4
Explanation:
The human heart has four chambers, which are the left atrium, left ventricle, right atrium, and right ventricle. These chambers work together to pump blood throughout the body. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and passes it to the left ventricle, which then pumps it out to the rest of the body. Therefore, the correct answer is 4.
6.

The right side of the heart pumps the blood _____ the heart ______ the lungs.

Answer: From, to
Explanation:
The right side of the heart pumps blood from the heart to the lungs. This is because the right side of the heart receives deoxygenated blood from the body through the veins and pumps it to the lungs via the pulmonary artery. In the lungs, the blood picks up oxygen and releases carbon dioxide, becoming oxygenated. Then, the oxygenated blood returns to the left side of the heart via the pulmonary veins to be pumped out to the rest of the body.
7.

When in the lungs, the __________ leaves the blood.

Answer: Carbon Dioxide
Explanation:
When in the lungs, carbon dioxide leaves the blood. This is because during the process of respiration, oxygen is taken in by the lungs and transported to the cells, while carbon dioxide is produced as a waste product by the cells and carried back to the lungs through the bloodstream. In the lungs, carbon dioxide diffuses from the blood into the alveoli, which are tiny air sacs where gas exchange occurs. From the alveoli, carbon dioxide is then exhaled out of the body.
8.

What is the largest blood vessel?

Answer: Aorta
Explanation:
The aorta is the largest blood vessel in the human body. It is the main artery that carries oxygenated blood from the heart to the rest of the body. It originates from the left ventricle of the heart and branches out to supply blood to all organs and tissues. Due to its size and function, the aorta is considered the largest blood vessel.
9.

Where do arteries carry blood?

Answer: Away from the heart.
Explanation:
Arteries carry blood away from the heart to various parts of the body. They transport oxygen-rich blood from the heart to the tissues and organs, except for the pulmonary arteries, which carry oxygen-depleted blood from the heart to the lungs for oxygenation.
10.

What is the smallest blood vessel?

Answer: Capillaries
Explanation:
Capillaries are the smallest blood vessels in the body. They are responsible for connecting arteries to veins and allow for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Capillaries have thin walls that allow for easy diffusion of substances, and their large surface area enables efficient exchange. This makes them crucial for delivering oxygen and nutrients to cells and removing waste products from the body. Arteries and veins are larger blood vessels that transport blood to and from the capillaries.
11.

What links the arteries to the veins?

Answer: Capillaries
Explanation:
Capillaries are the tiny blood vessels that connect arteries to veins. They form a network throughout the body, allowing for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Capillaries have thin walls, which enable them to facilitate the diffusion of substances. This connection between arteries and veins through capillaries is crucial for maintaining proper blood flow and ensuring that oxygen and nutrients are delivered to the tissues while waste products are removed.
12.

Where do the veins carry blood to?

Answer: To the heart.
Explanation:
Veins carry blood back to the heart. After the oxygen-rich blood is delivered to the body's tissues by the arteries, the veins collect the oxygen-depleted blood and transport it back to the heart. From there, the blood is pumped to the lungs to be oxygenated again before returning to the rest of the body. Therefore, the correct answer is "To the heart."
13.

What happens when blood pools in the veins?

Answer: You get varicose veins.
Explanation:
When blood pools in the veins, it can cause the veins to become enlarged and twisted, resulting in varicose veins. This happens when the valves in the veins that help regulate blood flow become weak or damaged, causing blood to flow backward and accumulate in the veins. Varicose veins can be painful and unsightly, and they commonly occur in the legs.
14.

Where is plasma found?

Answer: In blood.
Explanation:
Plasma is a component of blood that makes up about 55% of its total volume. It is a yellowish fluid that carries various substances such as nutrients, hormones, waste products, and antibodies throughout the body. Plasma also plays a crucial role in maintaining blood pressure and regulating body temperature. It is distinct from urine, which is produced by the kidneys to eliminate waste products from the body. It circulates through blood vessels and is found throughout the body.
15.

Plasma is about _____ percent water.

Answer: 90
Explanation:
Plasma is the liquid component of blood and is composed mostly of water. It makes up about 90 percent of plasma, with the remaining 10 percent consisting of various solutes such as proteins, electrolytes, hormones, and waste products. This high water content allows plasma to carry nutrients, hormones, and waste products throughout the body, regulate body temperature, and maintain blood pressure.
16.

What is the most common type of blood cells?

Answer: Red blood cells
Explanation:
Red blood cells are the most common type of blood cells in the human body. They are responsible for carrying oxygen from the lungs to all the tissues and organs in the body, and also help remove carbon dioxide and waste products. Red blood cells are produced in the bone marrow and have a lifespan of about 120 days. They make up about 40-45% of the total blood volume and are easily identifiable due to their red color, which is caused by the presence of a protein called hemoglobin.
17.

Red blood cells transport ______.

Answer: Oxygen
Explanation:
Red blood cells transport oxygen. This is because red blood cells contain a protein called hemoglobin, which binds to oxygen molecules in the lungs and carries them to the body's tissues. Oxygen is necessary for cellular respiration, where it is used to produce energy. Therefore, red blood cells play a crucial role in delivering oxygen to all parts of the body, ensuring proper functioning and survival.
18.

What color are white blood cells?

Answer: Colorless
Explanation:
White blood cells are colorless because they lack pigmentation. They are transparent and do not absorb or reflect light, which gives them a colorless appearance. This allows them to move easily through the bloodstream and carry out their functions of fighting infection and disease.
19.

White blood cells contain a _______, while red blood cells do not.

Answer: Nucleus
Explanation:
White blood cells contain a nucleus, while red blood cells do not. The nucleus is a membrane-bound organelle that contains the genetic material of the cell. It plays a crucial role in controlling the cell's activities and is responsible for the cell's growth, reproduction, and response to stimuli. Red blood cells, on the other hand, lack a nucleus to make more space for the protein hemoglobin, which is responsible for carrying oxygen to the body's tissues.
20.

Which of the following is NOT a function of white blood cells.

Answer: Carry oxygen.
Explanation:
White blood cells, also known as leukocytes, are an essential part of the immune system and play a crucial role in defending the body against infections. They are responsible for fighting parasites and attacking bacteria, but they do not carry oxygen. The transportation of oxygen is primarily carried out by red blood cells, which contain hemoglobin and are specifically designed for this purpose. Therefore, carrying oxygen is not a function of white blood cells.
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