22Matthias SchleidenFirst to discover that plants are made up of cells
23Theodor SchwannDiscovered that all animals are made up of cells
24Rudolph VirchowVirchow's many discoveries include cells in bone and connective tissueIn 1855 he published his now-famous aphorism omnis cellula e cellula ("every cell stems from another cell").
25The Cell Theory All living things are made up of one or more cells. Cells are the basic units of structure and function in living things.New cells are produced from existing cells.
26made of one or more cells The cell theory states:All living things aremade of one or more cells
27The cell theory states: Cells are thebasic unit ofstructure andfunction inliving things
28The cell theory states: Living cellsonly come fromother livingcells
29The Cell TheoryThe modern tenets of the Cell Theory include: 1. All known living things are made up of cells. 2. The cell is structural & functional unit of all living things. 3. All cells come from pre-existing cells by division. (Spontaneous Generation does not occur). 4. Cells contains hereditary information which is passed from cell to cell during cell division. 5. All cells are basically the same in chemical composition. 6. All energy flow (metabolism & biochemistry) of life occurs within cells.
30Cell Theory All living things are made up of one or more cells. Cells are the basic unit of structure and function -smallest working units of all living things.All cells come from preexisting cells through cell division.
31Definition of CellA cell is the smallest unit that is capable of performing life functions.
32Prokaryotic Eukaryotic Two Types of CellsProkaryoticEukaryotic
33Prokaryotic Do not have structures surrounded by membranes Few internal structuresOne-celled organisms, Bacteria
49Nucleus Directs cell activities Separated from cytoplasm by nuclear membraneContains genetic material - DNA
50Nuclear Membrane Surrounds nucleus Made of two layers Openings allow material to enter and leave nucleus
51Chromosomes In nucleus Made of DNA Contain instructions for traits & characteristics
52Nucleolus Inside nucleus Contains RNA to build proteins
53Cytoplasm Gel-like mixture Surrounded by cell membrane Contains hereditary material
54Endoplasmic Reticulum Moves materials around in cellSmooth type: lacks ribosomesRough type (pictured): ribosomes embedded in surface
55Ribosomes Each cell contains thousands Make proteins Found on ribosomes & floating throughout the cell
56MitochondriaProduces energy through chemical reactions – breaking down fats & carbohydratesControls level of water and other materials in cellRecycles and decomposes proteins, fats, and carbohydrates
57Golgi Bodies Protein 'packaging plant' Move materials within the cell Move materials out of the cell
58Lysosome Digestive 'plant' for proteins, fats, and carbohydrates Transports undigested material to cell membrane for removalCell breaks down if lysosome explodes
59Vacuoles Membrane-bound sacs for storage, digestion, and waste removal Contains water solutionHelp plants maintain shape
60Chloroplast Usually found in plant cells Contains green chlorophyll Where photosynthesis takes place