The earth is home to over 7 billion human beings. Each person is a unique being, different from all other beings in many ways, as is the case with outward appearance.
But the human body is made up of basically the same structures and we are all influenced by the environment in which we live. This influence comes from the social environment, the culture of which we are part and also from the affective relationships we experience.
Let us then study some aspects related to the structure and functioning of the human body, from the cells to the systems that compose it.