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1 BCE
Cell
Cells are the basic structures of all living organisms. Cells provide structure for the body, take in nutrients from food and carry out important functions. -
1 BCE
Tissue
Tissues are groups of cells that have a similar structure and act together to perform a specific function. There are four different types of tissues in animals: connective, muscle, nervous, and epithelial. In plants, tissues are divided into three types: vascular, ground, and epidermal. Groups of tissues make up organs in the body such as the brain and heart. -
1 BCE
Organ
Groups of tissues make up organs in the body such as the brain and heart.
