Cell Structure & Function http://koning.ecsu.ctstateu.edu/cell/cell.html
Cell Theory • All living things are made up of cells. • Cells are the smallest parts of all living things. • All cells come from other cells that divide to make new ones.
Definition of Cell A cell is the smallest unit that is able to do life tasks.
Examples of Cells One celled organism Plant Stem Bacteria Red Blood Cell Nerve Cell
Types of Cells We Will Study Plant Animal
Parts of Cells • Both cells have organelles in them. • Each organelle has a special job to do to help the cell function. • We will only be learning about some of the organelles. http://library.thinkquest.org/C004535/eukaryotic_cells.html
“Typical” Plant Cell http://waynesword.palomar.edu/images/plant3.gif
“Typical” Animal Cell http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif
Cell Parts(You saw lots of cell parts, called organelles, in the preceding slides.Don’t worry we will only study the organelles on the following slides.)Are you ready? Introducing the Organelles!
Cell Membrane • Outer membrane of cell that controls movement of nutrients, water and gases in and out of the cell http://library.thinkquest.org/12413/structures.html
Cell Wall • In plant cells • Supports & protects the cell http://library.thinkquest.org/12413/structures.html
Nucleus • Directs cell activities • Contains genetic material - DNA
Chromosomes • In nucleus • Made of DNA • Contain instructions for traits & characteristics http://library.thinkquest.org/12413/structures.html
Cytoplasm • Gel-like mixture • All organelles are in the cytoplasm
Mitochondria • Produces energy – by chemical reactions that break down fats & carbohydrates http://library.thinkquest.org/12413/structures.html
Vacuoles • Sacs for storage • Contains water • Help plants keep shape http://library.thinkquest.org/12413/structures.html
Chloroplast • In plant cells • Contains green chlorophyll • It is where photosynthesis takes place http://library.thinkquest.org/12413/structures.html