Final answer:
The six levels of organization in the human body, from smallest to largest, are chemical, cellular, tissue, organ, organ system, and organism. Examples include DNA for the chemical level, red blood cells for the cellular level, and the heart for the organ level.
Step-by-step explanation:
Levels of Organization in the Human Body
The human body is a complex system organized at different levels. Starting from the smallest to the largest, the levels of organization are:
- Chemical Level – This level includes subatomic particles, atoms, and molecules. An example is DNA, which is a molecule made up of atoms like carbon, hydrogen, oxygen, nitrogen, and phosphorus.
- Cellular Level – Cells are the basic units of life. An example is a red blood cell, which carries oxygen throughout the body.
- Tissue Level – Tissues are groups of similar cells working together. An example of a tissue is muscle tissue that helps in body movement.
- Organ Level – Organs are made up of different types of tissues. The heart is an organ that pumps blood.
- Organ System Level – Organ systems consist of different organs that work together. The circulatory system, for example, includes the heart, blood, and blood vessels.
- Organism Level – An organism is a living being, and in this context, it is a human.
Each level of organization is more complex than the one before it, as it represents the integration of its components to perform functions necessary for life.