The foot is a dynamic structure that changes shape in response to its instantaneous function, enabling the transmission and distribution of load during walking, running, and standing. Preservation of structural integrity and function depends on the continuous coordinated activity of the muscles and tendons around the foot and ankle. These muscle tendon units regulate multiaxial movements, stabilize the arches, and contribute to energy storage and return. A detailed examination of the tendons` anatomical characteristics and functions is therefore crucial for understanding foot and ankle mechanics, recognizing pathologies, and determining treatment strategies. In this section, the anatomical characteristics of the extrinsic tendons that originate in the leg and traverse the anterior, posterior, and lateral compartments to reach the foot and ankle, together with their functional and clinical relevance, will be discussed.