Anatomical structures refer to the various parts of the body that have specific shapes and functions. These structures can be classified into different categories, such as organs, tissues, and cells. For example, the heart is an organ that pumps blood, while muscle tissue enables movement. Each anatomical structure is made up of smaller components that work together to perform essential tasks. For instance, neurons are specialized cells that transmit signals in the nervous system, allowing communication between different body parts. Understanding these structures is crucial for studying biology and medicine.