Biological Organization

• Multicellular Organism: Living things composed of many cells. 
• Organ System: Two or more organs working.
• Organ: A structure usually composed of several tissue types.
• Tissue: A group of similar cells het perform a specific function.
• Cell: The smallest unit of life
• Organelle: A structure within a cell that performs an especific function
• Molecule: A combination of atoms
• Atoms: The smallest particle of an element
• Subatomic Particle: Particles that make up an atom