Trace this hierarchy, defining and describing each rung on the ladder and the part of the human body that each rung represents, starting with the bottom rung.

1. Cell: The fundamental unit of life in the human body. Cells make up tissues, organs, and organ systems.

2. Tissue: A group of cells that work together to perform a specific function. Examples include muscle tissue, nerve tissue, and connective tissue.

3. Organ: A structure composed of different tissues that work together to perform a specific function. Examples include the heart, liver, and lungs.

4. Organ System: A group of organs that work together to carry out a particular function in the body. Examples include the cardiovascular system, nervous system, and digestive system.

5. Human Body: The entire organism, made up of multiple organ systems that work together to maintain homeostasis and support life. The body includes various systems such as the skeletal system, muscular system, respiratory system, and circulatory system.