Organ System

• CELL - basic structural and functional unit of all forms of life.
• MULTICELLULAR ORGANISMS - an organism that consists of more than one cell.
• UNICELLULAR ORGANISMS (SINGLE-CELLED ORGANISM) - consist of a single cell.
• TISSUE - group of cells that possess a similar structure and perform a specific action "to weave".
• ORGAN - a collection of tissues that structurally form a functional unit specialized to form or perform a particular function.
• ORGAN SYSTEM - group of organs that work together to perform a specific function
• Nervous, Reproductive, Endocrine - connected to each other.