The ultimate guide to human physiology
<p>At the core of human physiology is the cell, the basic unit of life. Cells carry out essential functions such as energy production, metabolism, and communication. The intricate network of cells forms tissues, and tissues collaborate to create organs. Each organ contributes to specific physiological systems, such as the cardiovascular, respiratory, digestive, and nervous systems.</p>
<p>The cardiovascular system, composed of the heart and blood vessels, circulates blood throughout the body. This transportation system ensures the delivery of oxygen, nutrients, and hormones to cells, while simultaneously removing waste products. The heart, a muscular pump, plays a crucial role in maintaining blood circulation, ensuring the body’s overall well-being.</p>
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