Answer:
1: Cells
2: Tissues
3: Organs
4: Organ Systems
5: Organisms
Explanation:
1: A Cell is the basic unit of life. Some people refer to it as "building blocks of life."
2: Tissues are groups of cells that work together to achieve a certain task.
3: Organs are groups of tissue that work to make the vital parts of the body
4: Organ Systems are groups of organs that work together to provide for body function. EX: Respiratory System, Circulatory System, Digestive, etc.
5: Organisms are any living thing that have many organ systems that work together. EX: Humans.
