Heart Anatomy
These are the four chambers of the human heart.
What are the right atrium, right ventricle, left atrium, and left ventricle?
This is the primary function of the heart.
What is to pump blood throughout the body?
These are the main organs of the respiratory system.
What are the lungs?
This gas is primarily exchanged in the alveoli of the lungs.
What is oxygen?/What is Carbon dioxide?
These vessels carry blood away from the heart.
What are arteries?
This is the largest chamber of the heart, responsible for pumping oxygenated blood into the aorta.
What is the left ventricle?
This phase of the cardiac cycle involves the relaxation of the heart muscles, allowing the chambers to fill with blood.
What is diastole?
These are the small air sacs where gas exchange occurs in the lungs.
What are alveoli?
This muscle contracts during inhalation to increase the volume of the thoracic cavity.
What is the diaphragm?
This major artery is the largest in the human body and carries oxygenated blood from the heart to the rest of the body.
What is the aorta?
This valve prevents the backflow of blood from the right ventricle to the right atrium.
What is the tricuspid valve?
This node, located in the right atrium, initiates the electrical impulse that sets the rhythm for the heartbeat.
What is the sinoatrial (SA) node?
The right lung has this many lobes.
What are three lobes?
At the hilum of the left lung, this structure is positioned superior to the bronchus.
What is the pulmonary artery?
This large vein carries deoxygenated blood from the lower half of the body back to the heart.
What is the inferior vena cava?
This artery, also known as the "widow maker," supplies blood to the front of the left side of the heart.
What is the left anterior descending (LAD) artery?
This term describes an abnormally slow heart rate, typically defined as fewer than 60 beats per minute.
What is bradycardia?
This fluid-filled space between the lungs and the chest wall helps reduce friction during breathing.
What is the pleural cavity?
This protein in red blood cells transports oxygen from the lungs to the tissues.
What is hemoglobin?
These tiny blood vessels connect arteries to veins and allow for the exchange of oxygen, nutrients, and waste between blood and tissues.
What are capillaries?
These vessels carry oxygenated blood from the lungs to the left atrium of the heart.
What are the pulmonary veins?
This formula is used to calculate cardiac output.
What is heart rate times stroke volume?
In the hilum of the right lung, this blood vessel is positioned anterior to the bronchus; in the left lung, it is positioned superior to the bronchus.
What is the pulmonary artery?
These muscles, along with the abdominal muscles, are primarily responsible for forced exhalation.
What are the internal intercostal muscles?
These small blood vessels, which have a significant amount of smooth muscle in their walls, play a crucial role in regulating systemic blood pressure by adjusting their diameter.
What are arterioles?