What are the four levels of hierarchical organization in the human body, from simplest to most complex?

Cells, tissues, organs, organ systems

Describe the relationship between cells and tissues.

Tissues are collections of similar, specialized cells that work together to perform a specific function.

Epithelial tissue is made of specialized cells that protect the mouth from wear and tear, providing a protective barrier.

Organs are made up of multiple different types of tissues working together, whereas tissues are composed of similar cells.

I can describe how cells, tissues, organs, and organ systems work together in the human body.

1
The human body has a hierarchical organization, meaning it's made up of nested layers, including cells, tissues, organs, and organ systems.
2
Tissues are collections of similar, specialized cells that work together, while organs are structures made up of multiple tissue types.
3
An organ system is a group of organs that work together to carry out complex functions, such as the respiratory system, which includes the lungs, trachea, nose, and diaphragm.