Cell Organelles http://koning.ecsu.ctstateu.edu/cell/cell.html

What is a Cell? A cell is the smallest unit that is capable of performing life functions.

Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell Nerve Cell

Animal Cell http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif

Plant Cell http://waynesword.palomar.edu/images/plant3.gif

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

Prokaryotic Eukaryotic Two Types of Cells Prokaryotic Eukaryotic

Prokaryotic Do not have structures surrounded by membranes Few internal structures One-celled organisms, Bacteria http://library.thinkquest.org/C004535/prokaryotic_cells.html

Eukaryotic Contain organelles surrounded by membranes Most living organisms Plant Animal http://library.thinkquest.org/C004535/eukaryotic_cells.html

tiny structures that carry out specific functions in a cell Organelle- tiny structures that carry out specific functions in a cell

Surrounding the Cell

Cell Membrane Outer layer of cell that controls movement in and out of the cell Double layer

Talk about it… What type of things do you think the cell would want to let in? Let out? What types of things would a cell want to make sure doesn’t get into or out of the cell? Every cell has a cell membrane. Why do you think this is? Why can’t cells live without it?

Cell Wall Most commonly found in plant cells & bacteria Supports & protects cells http://library.thinkquest.org/12413/structures.html

Talk about it… Animal cells lack a cell wall. Why do you think they don’t need a cell wall?

Inside the Cell

Nucleus Directs cell activities Separated from cytoplasm by nuclear membrane Contains genetic material - DNA

Talk about it… Prokaryotic cells like bacteria do not have a nucleus. How do you think they live without it?

Mitochondria Bean shaped organelle, surrounded by two membranes Produces energy through chemical reactions – breaking down fats & carbohydrates Recycles and decomposes proteins, fats, and carbohydrates http://library.thinkquest.org/12413/structures.html

Talk about it… Mitochondria take in sugar and oxygen and make carbon dioxide and water. Why go to this trouble? What would the cell get out of it?

Chloroplast Usually found in plant cells Contains green chlorophyll Where photosynthesis takes place http://library.thinkquest.org/12413/structures.html

Talk about it… There are many more organelles in a cell. Pick two and based on the structure of each, propose a function that it could provide to the cell to help it live

How complex cells evolved https://www.youtube.com/watch?v=9i7kAt97XYU https://app.discoveryeducation.com/learn/videos/EC8D1E26-14D8-41CE-8002-5C5A549954B6?hasLocalHost=false