Heart Anatomy & Physiology

Front

What is cardiac output?

Back

Cardiac output is the volume of blood the heart pumps per minute, calculated as heart rate (beats per minute) multiplied by stroke volume (the amount of blood pumped with each beat).

Tags

NGSS.HS-LS1-3

Front

What is the equation for calculating cardiac output?

Back

Cardiac output = heart rate x stroke volume.

Front

What are Purkinje fibers?

Back

Purkinje fibers are specialized conductive fibers located in the inner ventricular walls of the heart that help transmit electrical impulses, leading to coordinated heart contractions.

Front

What is the correct path for the transmission of an impulse in the intrinsic conduction system of the heart?

Back

The correct path is: SA node → AV node → Bundle of His → Bundle branches → Purkinje fibers.

Front

What is the largest artery in the body?

Back

The largest artery in the body is the aorta.

Front

What is the average blood pressure for a healthy adult?

Back

The average blood pressure for a healthy adult is 120/80 mmHg.

Front

What is stroke volume?

Back

Stroke volume is the amount of blood ejected by the left ventricle of the heart in one contraction.

Front

What is heart rate?

Back

Heart rate is the number of times the heart beats in one minute.

Tags

NGSS.HS-LS1-3

Front

What role does the SA node play in the heart?

Back

The SA node, or sinoatrial node, acts as the natural pacemaker of the heart, initiating electrical impulses that trigger heartbeats.

Front

What is the function of the AV node?

Back

The AV node, or atrioventricular node, receives impulses from the SA node and delays them before passing them to the Bundle of His, allowing the atria to contract before the ventricles.