Question

How is the human body similar to society?

Answer 1

Hint: Typically the comparison is used the other way around, but it can work both directions, I suppose. Both are larger creatures made up of specialized human components. The body system is structured in such a way that, without the other, one component cannot function effectively.

Complete answer:
Society was composed of interconnected entities that relied on each other to operate (e.g. education, families, government).
Society is seen by functionalists as analogous to the human body. The body depends on the heart to pump blood to other vital organs such as the lungs and brain, in the same manner. Functionalists see culture as being composed with multiple elements that are interdependent, such as family and schooling.
So in the same way that the human body would collapse if the heart stopped, the theory of functionalists would stop working properly if the family stopped working properly.
This will arise because the family is an institution in which primary socialization happens, functionalists claim. Primary socialization is where social expectations, values and ideals are taught to younger members of a society.
A variety of complex structures, including the skeletal system, the respiratory and reproductive systems, as well as complicated blood and lymph vessel networks, all regulated by the brain and nervous system, compose the human body.

Note: The whole organism will struggle, or even die, unless all of the parts work appropriately, as required, and in coordination with the other parts. If you understand all of them well enough you will continue making analogies to various areas of the body and related social roles.