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Cells in Organisms
Matter and Energy Cycles
Plant and Animal Adaptations
DNA and Chromosomes
Sexual and Asexual Reproduction
Cells to Body Systems
The Cell Is Alive
Get and Use Energy: Photosynthesis
Photosynthesis uses energy from the sun, water, and Carbon Dioxide to make food, in the form of a sugar called glucose. The process also makes oxygen that animals, including humans, and other organisms can use to breath.
Get and Use Energy/Metabolism: Cellular Respiration
Mitochondria, found in both plant and animal cells, are responsible for cellular respiration.
The process of cellular respiration breaks down food such as sugar and release the energy in the form of ATP for the cell to use. This happens in both plant and animal cells.
Cellular Respiration and Photosynthesis working together
Photosynthesis and Respiration are going on all the time. Plants take carbon dioxide from the air and give off oxygen. Animals, and other organisms, use oxygen and give off carbon dioxide. This is show below.
Grow, Develop, and Reproduce: Mitosis
Cells Divide because:
1) Repair: Cells have a limited life and need to be replaced with newer ones
2) Growth: As an organism grows it needs more cells.
Mitosis the the process used to make more cells
By Mysid - Vectorized in CorelDraw by Mysid from http://www.ncbi.nlm.nih.gov/About/primer/genetics_cell.html., Public Domain, https://commons.wikimedia.org/w/index.php?curid=1414818
When Mitosis Goes Wrong: Cancer
Cancer is a disease in which cells multiply out of control, over and over, destroying healthy tissue
Respond and Homeostasis: Osmosis and Diffusion
Diffusion is the movement of molecules from a crowded area to a less crowed area.
In cells molecules move through tiny holes in the cell membrane. Only molecules small enough to fit through the holes are let in.
Image Credit: By BruceBlaus - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=29452222
Osmosis is the diffusion of WATER molecules through a membrane.
Click here for an simple animation of osmosis. Will not work on IOS (ipads, iphones) devices.
Next to Cells in Organisms Coming Soon!