Living cells and extracellular materials make up the human body, which is organised into tissues, organs, and organ systems. Organs with similar functions frequently work together to construct complete organ systems. There are 11 basic organ systems in the human body. An organ system is a collection of organs that collaborate to complete a difficult task. They are in charge of all of the body's fundamental processes. Organ systems serve a variety of roles. These systems are inextricably linked. As a result, if one isn't working well, the others will be affected, either directly or indirectly. The overall functioning of the organs and systems inside the body creates homeostasis, or a condition of equilibrium. The endocrine system, the muscular system, the skeletal system, the lymphatic system, the respiratory system, the digestive system, the neurological system, the endocrine system, the cardiovascular system, and the urinary system are all parts of the human body.