Physiological needs are the basic requirements for human survival. These include essentials such as air, water, food, shelter, sleep, and clothing. Without these fundamental needs being met, individuals cannot function effectively or maintain their health. In the context of Maslow's Hierarchy of Needs, physiological needs form the foundation of the pyramid. They must be satisfied before individuals can focus on higher-level needs, such as safety, love, and self-actualization. Meeting these needs is crucial for overall well-being and development.