28 1 Levels of Organization Levels of Structural

28. 1 Levels of Organization Levels of Structural Organization Atom ÄMolecule ÄCell ÄTissue ÄOrgan System ÄOrganism

28. 1 Levels of Organization Examples: Atom Molecule Cell Tissue Organ System Organism ≈ carbon ≈ phospholipid ≈ nerve cell ≈ nervous tissue ≈ brain ≈ nervous system ≈ human

28. 1 Levels of Organization 1. Atoms combine to form molecules Atoms Molecule

28. 1 Levels of Organization 2. Molecules form cells Molecules Cell

28. 1 Levels of Organization 3. Cells form tissues Similar cells with a common function form tissues • There are 4 basic tissue types in the human body: • Epithelial • Nervous • Muscular • Connective

28. 1 Levels of Organization 4. Specialized cells function together in tissues, organ systems, and the whole organism. • Specialized cells perform specific tasks. • Tissues are groups of similar cells working together. – epithelial tissue – connective tissue – muscle tissue – nervous tissue cell tissue

28. 1 Levels of Organization 5. Tissues form organs • Two or more tissue types form an organ An organ is a structure that performs a specific function for the body

28. 1 Levels of Organization 6. Organs form Organ Systems • A group of organs which work together for a common purpose is an organ system Brain, Spinal Cord, etc. Nervous System

28. 1 Levels of Organization All of the organ systems form the organism