1.4.2 The Heart

• How many chambers does the human heart have?

  Four
• Match the heart chamber or valve with its function or location:

  Right Atrium ↔️ Receives deoxygenated blood

  Pulmonary Valve ↔️ Between right ventricle and pulmonary artery

  Left Ventricle ↔️ Pumps oxygenated blood to aorta
• The right atrium receives deoxygenated blood from the superior and inferior vena cava.
• Which chamber receives deoxygenated blood from the body?

  Right Atrium
• The tricuspid valve is located between the right atrium and right ventricle.
• Valves ensure that blood flows in only one direction through the heart.


  True
• Oxygenated blood returns to the left atrium via the pulmonary veins.
• The valves in the heart ensure that blood flows in only one direction
• What is the natural pacemaker of the heart called?

  Sinoatrial (SA) Node
• Match the electrical component of the heart with its function:

  SA Node ↔️ Generates electrical impulses

  AV Node ↔️ Transmits electrical signal

  Purkinje Fibers ↔️ Distribute signal to ventricles
• What carries oxygenated blood from the lungs to the left atrium?

  Pulmonary veins
• The right atrium receives deoxygenated blood from the superior and inferior vena
• The right atrium pumps deoxygenated blood to the right ventricle
• What ensures that blood flows in only one direction through the heart?

  Valves
• The right ventricle pumps deoxygenated blood to the lungs via the pulmonary artery.
• The pulmonary valve is located between the right ventricle and pulmonary artery.


  True
• Which valve allows blood to flow from the right ventricle to the pulmonary artery?

  Pulmonary Valve
• Which artery carries oxygenated blood from the left ventricle to the body?

  Aorta
• Which valve does deoxygenated blood pass through when flowing from the right ventricle to the pulmonary artery?

  Pulmonary valve
• The SA node generates electrical impulses to coordinate atrial contraction.


  True
• Arrange the stages of the heartbeat cycle in the correct sequence:

  1️⃣ Atrial Systole

  2️⃣ Ventricular Systole

  3️⃣ Diastole
• The valves in the heart ensure that blood flows in only one direction
• What blood vessel does the right ventricle pump deoxygenated blood through to the lungs?

  Pulmonary artery
• Place the heart chambers and valves in the order they appear in the circulatory system, starting from the vena cava and ending with the aorta:

  1️⃣ Right Atrium

  2️⃣ Tricuspid Valve

  3️⃣ Right Ventricle

  4️⃣ Pulmonary Valve

  5️⃣ Left Atrium

  6️⃣ Mitral (Bicuspid) Valve

  7️⃣ Left Ventricle

  8️⃣ Aortic Valve
• The valves in the heart ensure blood flows in only one direction.


  True
• The valves in the heart prevent blood from flowing in the opposite direction
• What happens during atrial systole?

  Atria contract
• From which organ does the left atrium receive oxygenated blood?

  Lungs
• What is the purpose of the valves in the heart?

  Ensure unidirectional blood flow
• Match the heart valve with its function:

  Tricuspid ↔️ Right atrium to right ventricle

  Pulmonary ↔️ Right ventricle to pulmonary artery

  Mitral (Bicuspid) ↔️ Left atrium to left ventricle

  Aortic ↔️ Left ventricle to aorta
• The left atrium receives oxygenated blood from the lungs.

  True
• Where is the mitral valve located?

  Left atrium and left ventricle
• Order the flow of blood through the entire heart, starting with deoxygenated blood:

  1️⃣ Right Atrium

  2️⃣ Right Ventricle

  3️⃣ Pulmonary Artery

  4️⃣ Lungs

  5️⃣ Pulmonary Veins

  6️⃣ Left Atrium

  7️⃣ Left Ventricle

  8️⃣ Aorta
• Arrange the following steps in the correct sequence for the flow of deoxygenated blood through the heart:

  1️⃣ Right Atrium

  2️⃣ Right Ventricle

  3️⃣ Pulmonary Artery

  4️⃣ Lungs
• Which artery carries oxygenated blood from the left ventricle to the body?

  Aorta
• Which node receives the electrical signal from the SA node and transmits it to the ventricles?

  Atrioventricular (AV) Node
• During diastole, the heart chambers relax and refill with blood.

  True
• Match the heart chamber with its function:

  Right Atrium ↔️ Receives deoxygenated blood

  Left Ventricle ↔️ Pumps oxygenated blood to body

  Pulmonary Artery ↔️ Carries deoxygenated blood to lungs
• The left atrium receives oxygenated blood from the pulmonary veins.


  True
• The heart's chambers and valves work together to pump blood through the body.

  True