This is how we are made…..
When building a city we start with bricks. Many bricks joined together make walls. Walls working together make a building. Many buildings make a city.
Thus,the human body is put together in a similar way. Humans start with cells. Many cells joined together make tissue. Tissue working together make an organ. Many organs make an organ system. Many Organ systems form an Organism.
From smallest to largest the parts of our body are cell, tissues organs and then organ systems.