Final answer:
The human body comprises 11 major organ systems, each with its specific functions, although many organs contribute to multiple systems.
Step-by-step explanation:
There are 11 major organ systems in the human body. These systems include the integumentary (skin and associated structures), skeletal (bones), muscular (muscles), nervous (nerves, brain, spinal cord), endocrine (glands releasing hormones), cardiovascular (heart and blood vessels), lymphatic (lymph nodes and vessels), respiratory (lungs and airways), digestive (stomach, intestines, and associated organs), urinary (kidneys and bladder), and reproductive systems (organs related to reproduction). Each system has its own function but often works interdependently with other systems.
Assigning organs to these systems can sometimes be complex, as many organs contribute to more than one system. For instance, the pancreas is part of the digestive system as it produces digestive enzymes but also part of the endocrine system as it releases insulin.