Organizational Levels in Cities and Human Bodies

• Cities are built from the ground up, starting with individual bricks
• Bricks come together to form walls, walls form buildings, and buildings make up a city
• Human body is also made up of similar levels of organization, starting with cells
• Cells combine to form tissue, tissue forms organs, and organs make up organ systems
• Brain is an example of an organ, made up of brain tissue, which is a collection of brain cells
• Lungs are another example of an organ, made up of lung tissue, a collection of lung cells
• Nervous system is an organ system, consisting of the brain, spinal cord, and nerves, responsible for collecting and processing information
• Respiratory system is another organ system, made up of lungs, diaphragm, and other structures, responsible for breathing
• Skeletal system is another organ system, made up of bones, cartilage, ligaments, and tendons, providing structure and support to the body.

Explore the organizational levels in cities and human bodies, from individual bricks and cells to organ systems responsible for important functions. Understand how different components come together to form larger structures.