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Cells

Defining Life

 

The Microscope

 

The Cell

 

The Cell's

Alive

 

Cells in Organisms

Ecology

Matter and Energy Cycles

 

Organsim Interactions

 

Plant and Animal Adaptations

Genetics

DNA and Chromosomes

 

Traits

 

Sexual and Asexual Reproduction

 

Punnet Squares

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Human Body

Cells to Body Systems

 

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Life Science Links

 

The Cell Is Alive

Get and Use Energy: Photosynthesis

Chloroplast, found in plant cells, are responsible for 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

 

Image Credit: 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.

 

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Next to Cells in Organisms Coming Soon!