Truth or Lie: Cardiovascular System Edition

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• Your heart beats faster when you’re scared because it’s pumping more blood to your muscles.

• The heart only pumps blood during exercise.

• The heart has four chambers that help pump blood around your body.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The right side of your heart sends blood to your lungs to pick up oxygen.

• Blood in your veins is blue because it’s low in oxygen.

• The largest artery in your body is called the aorta.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The heart is about the size of your fist.

• The heart is located directly in the center of your chest.

• Arteries carry blood away from the heart.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The more you exercise, the fewer beats your heart needs to make to pump the same amount of blood.

• The heart’s natural pacemaker is called the sinoatrial (SA) node.

• Your pulse is your heart rate, and it can be felt in places like your wrist and neck.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• Blood pressure is higher in arteries than in veins.

• Capillaries are tiny blood vessels where oxygen is exchanged for carbon dioxide.

• Veins have thicker walls than arteries because they carry blood back to the heart.

Multiple Choice

Two Truths and a Lie: Science Edition

• Your heart takes a break when you hold your breath.

• Your heart works non-stop, even while you’re sleeping.

• The left ventricle is the strongest chamber of your heart.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The tricuspid valve keeps blood from flowing backward into the right atrium.

• The mitral valve is another name for the heart's pacemaker.

• The pulmonary artery carries blood from the heart to the lungs.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The heart can rest for a few minutes when you’re lying down.

• The heart’s main job is to keep your blood moving around your body.

• The average adult heart beats about 60-100 times per minute.

Multiple Choice

Two Truths and a Lie: Science Edition

Identify the LIE only

• The right side of the heart is responsible for pumping blood to your toes and fingers.

• Blood in the arteries is usually bright red because it’s full of oxygen.

• The left side of the heart is responsible for pumping oxygen-rich blood to the entire body.

Multiple Choice

Identify the LIE only

• The pericardium is a protective sac that surrounds your heart.

• White blood cells are responsible for carrying oxygen throughout your body.

• Your heart’s electrical system controls how fast it beats.

Multiple Choice

Identify the LIE only

• The heart pumps blood directly into your stomach to help digest food.

• Your heart can skip a beat when you’re excited or nervous.

• The heart is a muscle that gets stronger with regular exercise.

Multiple Choice

Identify the LIE only

• The left ventricle pumps oxygen-rich blood into the aorta, which carries it to the rest of your body.

• The superior vena cava carries oxygen-rich blood from the lungs to the heart.

• The heart’s valves act like doors, opening and closing to keep blood flowing in the right direction.

Multiple Choice

Identify the LIE only

• Blood is blue until it gets oxygen from your lungs.

• The blood in your arteries flows at a higher pressure than in your veins.

• The heart can generate its own electrical impulses, even outside of the body.

Multiple Choice

Identify the LIE only

• Your heart beats faster when you’re lying down than when you’re standing up.

• The heart rate of a fit person is usually lower at rest than that of an unfit person.

• The left side of the heart is stronger because it pumps blood to the entire body.

Multiple Choice

Identify the LIE only

• The sound of your heartbeat is caused by the valves in your heart closing.

• Your heart can continue to beat for a short time even after being removed from the body.

• All veins carry oxygen-rich blood, and all arteries carry oxygen-poor blood.