Cardiovascular System

Overview

The cardiovascular system maintains tissue perfusion by generating and distributing blood flow throughout the body. Through coordinated cardiac contraction and regulated vascular tone, this system ensures delivery of oxygen and nutrients while removing metabolic waste. Cardiovascular physiology integrates mechanical, electrical, and vascular processes to sustain systemic homeostasis.

Key Topics

This section includes core concepts such as cardiac output, control of heart rate and stroke volume, and the phases of the cardiac cycle. It also examines blood flow within vessels, venous return, and specialised circulations, including regional vascular adaptations. Together, these topics provide a structured understanding of how the heart and vasculature function as an integrated unit.

Clinical Relevance and Learning Focus

Disturbances in cardiac function or vascular regulation can result in impaired perfusion and organ dysfunction. Understanding cardiovascular physiology supports interpretation of ECG findings, haemodynamic changes, and patterns of circulatory compromise. This section emphasises systems-based reasoning, helping learners connect cardiac mechanics and vascular control to clinical presentation and physiological adaptation.