(1) A biological system
(2) A group of related or interdependent unified objects or components of a whole
A system pertains to interdependent or interrelated objects comprising and functioning as a whole. In biology, it may refer to the biological or body systems. A biological system is a group of organs that work together to carry out a particular task. In humans, there are different biological systems. They are integumentary system, lymphatic system, muscular system, nervous system, reproductive system , respiratory system, skeletal system, and urinary system. Each of these systems is comprised of biological organs that function for specific major functions. For instance, the human cardiovascular system whose primary role is to pump and channel blood to and from the body and lungs is comprised of heart, blood, and blood vessels.
In general sense, a system pertains to a group of related or interdependent unified components of a whole. Another biologically-relevant concept is the classification system. A classification system is A system for classifying organisms. It is a collection of procedures, characteristics, and definitions used to classify and/or identify, living things. Examples of things to be classified include mammals, birds, wetlands, plants, or insects.