DENDROLOGY

Detailed explanation-1: -A group of organs working together to perform a specific function is called an organ system.

Detailed explanation-2: -Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive.

Detailed explanation-3: -An organ is a group of tissues that work together for the overall function of the organ, and an organ system is a group of organs that work together to perform a specific function. The human organism consists of eleven organ systems.

Detailed explanation-4: -Physiology – the study of the functions of the body and its parts.