1 / 9

Cells

Cells. Cells are Living Things. The cell is the smallest unit of a living thing All living things have these characteristics: Organization The ability to develop and grow The ability to respond to the environment The ability to reproduce. Needs of Life.

lucius
Download Presentation

Cells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cells

  2. Cells are Living Things The cell is the smallest unit of a living thing All living things have these characteristics: • Organization • The ability to develop and grow • The ability to respond to the environment • The ability to reproduce

  3. Needs of Life • Organisms can’t carry out the activities that characterize life without these necessities: • Energy- all organisms require a steady supply of energy to stay alive • Materials- food, carbon dioxide, nitrogen, oxygen, and water • Living space- needs space to live and grow If any one of these requirements are missing, the organism will die

  4. All Living Things are Made of Cells • Unicellular- organisms made from a single cell (these are too small for you to see) Examples: Protists like amoebas, paramecium, and euglena • Multicellular- organisms made from many cells Examples: bats, humans, dogs, and MANY MORE!

  5. Cell Theory • Formed over a long time by many scientists combining their observations and evidence • 1. Every living thing is made of one or more cells • 2. Cells carry out the functions needed to support life • 3. Cells come only from other living cells

  6. Structures of a Cell • Cells are so tiny that it would take about 17,000 bacterial cells lined up to reach across a dime!! • Not all cells have the same structures • Eukaryotic Cell: has a nucleus • Prokaryotic Cell: does not have a nucleus

  7. Structures of an Animal Cell • Animal cells are eukaryotic • Cell Membrane: encloses the cell • Nucleus: contains information a cells needs to function. The “Control Center” of the cell. • Cytoplasm: all the material outside the nucleus but within the cell membrane

  8. Structures of an Animal Cell • Mitochondria: use oxygen to get energy from processing food. “Mighty Mitochondrian!” • Endoplasmic reticulum (ER): makes parts of the cell membrane “Factory” • Golgi apparatus: finishes processing materials made by the ER “Post Office” • Vesicles: move processed materials to Golgi apparatus “Postmen”

  9. Cell Storage, Recycling, and Waste • Cells store water, sugar, etc. which they use to function • Also store waste materials • Lysosomes: contain chemicals that break down old cell parts and materials taken into the cell “Garbage Disposal”

More Related