Levels of Organization
ATOMS• Smallest part of matter
• NON-living
Molecules • 2 or more bonded atoms
• Form compounds
• NON-living
Organelles• “Tiny organs”
• Made of molecules
Cell• Made of organelles
• Basic unit of structure & function
• LIVING
Examples of Cells
Cell Size and Shape
• Size and Shape depend upon its function.• Red blood cells are small and disc
shaped to fit through the smallest blood vessel.
• Muscle cells are long and thin. When they contract they produce movement.
• Nerve cells which carry signals to the brain are very long.
Cells
• Simple organisms such as bacteria, are single cell.
• Plants and animals are made up of many cells.
• Each kind of cell has a particular function.
Function of Cells
Cell Function
Releasing energy from food.
Making new cells for growth and repair.
Getting rid of body wastes.
Cell work together to perform basic life processes that keep organisms alive.
TISSUE• The same kind of cell workingtogether to perform a job iscalled tissue.• Tissues aremade of cellwoven together.
Tissue Description ExamplesCovers outside of body and lines inner surfaces of the body
Skin
Connects other tissue together. Supports, protects, and insulates organs
Ligaments, cartilage, blood
Contracts and relaxes to allow movement. Makes up some organs.
Heart, biceps, triceps
Transmits messages through the body
Brain, spinal cord, nerves
Plants have tissue too!
• Plants have tissues too. One tissue moves food around the plant to cells that need it.
• Another tissue carries water up from the plant’s roots to its leaves.
• Still another plant tissue forms the hard outer covering of trees known as bark. Bark acts as a protective covering for plants.
Organs• Tissues that work together to perform a function
• Living
Organ Systems• Organs that work together
• Living
Skeletal System
• Made of bones and cartilage that form the framework of your body.
• Bone cells Bone tissue BonesSkeletal System
Muscular System
• To allow movement, the bones and joints of the skeletal system must work with the muscular system.
• Muscular cells allow movement by contracting and relaxing.
• Muscle cell Muscle Tissue Muscle Muscular System
Muscular System
Digestive System
• Takes in materials that your body needs and creates
energy.• Muscle cell Muscle tissue
Stomach Digestive System
Nervous System
• Controls your bodies activities• Nerve cell Nervous Tissue Spinal Cord
Nervous System
Circulatory System
• Transports needed substances to parts of the body. Also carries awayWaste.
Organism• Entire living things (organisms)
• Plants and Animals
• May be a single cell –like an amoeba, paramecium, or bacteria
Population• Same type of organism living together
Community• Several populations living together
Ecosystem• A biotic (living) community plus the abiotic (nonliving) features
Biome• Similar ecosystems on earth together
Biosphere • Whole living layer around the globe
• Includes abiotic features
http://people.hofstra.edu/geotrans/eng/ch8en/conc8en/envisys.html
AtomMoleculeOrganelle
CellTissueOrgan
Organ System
OrganismPopulationCommunityEcosystem
BiomeBiosphere
Levels of Organization Mobile
• Use the Power Point Notes and the Sciencesaurus pages 82 – 102 to create a mobile.
