Cardiovascular Anatomy & Physiology
Cardiovascular anatomy and physiology refers to the structure and function of the heart and blood vessels. The heart, composed of four chambers, pumps blood throughout the body via arteries, veins, and capillaries. This system delivers oxygen and nutrients to tissues and removes waste products. Physiologically, it maintains blood pressure, regulates blood flow, and ensures homeostasis through coordinated contractions and electrical impulses, supporting overall health and organ function.
Cardiovascular Anatomy & Physiology
Cardiovascular anatomy and physiology refers to the structure and function of the heart and blood vessels. The heart, composed of four chambers, pumps blood throughout the body via arteries, veins, and capillaries. This system delivers oxygen and nutrients to tissues and removes waste products. Physiologically, it maintains blood pressure, regulates blood flow, and ensures homeostasis through coordinated contractions and electrical impulses, supporting overall health and organ function.
💡 Key Takeaways
- Identify the four heart chambers and the path of blood through the heart, including the roles of the heart valves (tricuspid, pulmonary, mitral, aortic).
- Explain how arteries, veins, and capillaries form the circulation that delivers oxygen and nutrients and removes wastes.
- Describe the cardiac cycle with systole and diastole and how valve movements relate to heart sounds.
- Summarize how heart rate and contractility are regulated by the autonomic nervous system and factors that influence circulation (preload, afterload, venous return).
❓ Frequently Asked Questions
What are the four chambers of the heart, and what is each chamber's primary role?
Right atrium — receives deoxygenated blood from the body via the superior and inferior vena cavae; right ventricle — pumps this blood to the lungs via the pulmonary artery; left atrium — receives oxygenated blood from the lungs via the pulmonary veins; left ventricle — pumps oxygenated blood to the body via the aorta.
What is the difference between arteries and veins?
Arteries carry blood away from the heart; veins carry blood toward the heart. Arterial blood is under higher pressure; veins have valves and rely on muscle movement to aid return.
What is the role of capillaries?
Capillaries are thin-walled vessels where exchange of oxygen, carbon dioxide, nutrients, and waste occurs between blood and tissues.
What is pulmonary circulation vs systemic circulation?
Pulmonary circulation moves blood between the heart and lungs for oxygenation (right heart to lungs, then to left atrium). Systemic circulation distributes oxygenated blood from the left ventricle to the body and returns deoxygenated blood to the right atrium.
What is the function of the heart valves?
Valves ensure one-way blood flow and prevent backflow—atrioventricular valves between atria and ventricles (tricuspid, mitral) and semilunar valves between ventricles and arteries (pulmonary, aortic).