Cell Structure Standard: 7.1.1 Identify and describe the function of major plant and animal cell organelles. Cells Cells can be separated into two groups.
Prokaryotic vs. Eukaryotic Prokaryotic Cells: NO Membranebound NUCLEUS Example: Bacteria Eukaryotic Cells: have a TRUE
NUCLEUS, membranebound Standard: 7.1.1 Identify and describe the function of major plant and animal cell organelles. Cell Parts Cells-the basic unit of life Organelles-small structures inside a cell with specific functions
Animal Cell Plant Cell What is the structure and function of the organelles in both a plant AND animal cell?
Cell Membrane Not an organelle, protective layer around the cells Cytoplasm Not an organelle, suspends
Cell Membrane Function: regulates what enters and leaves the cell; acts as a gatekeeper Structure: protective flexible double-layered outer covering of the cell Allows water to move freely into and out of the cell
CYTOPLASM: Function: holds all the other organelles in place Structure: a gel-like substance inside cells Place where many chemical reactions occur
Cytoskeleton- helps the cell maintain or change its shape NUCLEUS- The Brain Function: Control Center directs activities and contains information that determine a cells characteristics. Structure: spherical in shape, membrane bound, contains DNA, hereditary
material, that is stored on chromosomes Nucleus Nucleus as seen through an
electron microscope Nuclear Membrane Function: Regulates what enters and exits the nucleus Structure: Double Layer of Lipids
E) Nucleolus Nucleolus 1. Function: Produces RNA, which are used to make all proteins. 2. Structure: Inside Nucleus, separate from DNA Analogy The Mayor
H) Ribosomes Ribosome s Free Ribosomes 1. Function: Makes proteins. 2. Structure: small circular organelles
Analogy Restaurants, Factories, Builders. MITOCHONDRIA Function: releases energy from digested food for use by the cell, powerhouse of the cell Uses glucose to provide cells with energy Structure: Double membrane-bound, kidney shaped
Cells that use a lot of energy have more G) Endoplasmic Reticulum Rough ER Smooth ER 1. Function: Transportation route for
proteins. a. Rough ER: has ribosomes b. Smooth ER: no ribosomes 2. Structure: tubes and channels Analogy Roads & Sidewalks GOLGI BODIES/APPARATUS Function: packages materials and moves
them to the outside of the cell Structure: stacked, flattened membranes VACUOLE Function: storage for water, nutrients, and/or waste
Ex: pantry in a kitchen Structure: water filled sack floating in the cytoplasm J) Lysosomes Lysosome
s 1. Function: packets of enzymes that break down materials in a cell. 2. Structure: Small membrane-bound organelles Analogy Recycling center Comparing animal and plant
1. Function: microtubules that help divide the cell during cell division. Structure: Tubules CHLOROPLASTS-Plants only Function: converts sunlight into energy for the cell, where photosynthesis takes place Structure: green organelle that contains
chlorophyll and other structures Contain chlorophyll which gives plants their green color CELL WALL- Plants only Function: gives plant cells structure and support, like a skeleton Structure: wall-like structure made of cellulose
Levels of Organization Cell tissue organ organ systemorganism From Cell to Organism One celled organisms perform all their life
functions by themselves. In a many-celled organism, several systems work together in order to perform life functions efficiently. Each cell carries on its own life function while depending in some way on other cells in the organism.
Cell tissue organ organ systemorganism student science class all your classes 7 th grade middle school Cell to Organism Tissue-group of similar cells that work together
to do one job Each cell in a tissue does its part to keep the tissure alive Organ- structure made up of two or more different types of tissues that work together Your heart is an organ made up of cardiac muscle
tissue, nerve tissue, and blood tissues. Organ system- group of organs working together to perform a certain function Your heart, arteries, veins, and capillaries make up your cardiovascular system.
Cell Theory Rudolph Vichow hypothesized that cells divide to form new cells. The Cell Theory 1. All organism are made up of one or more cells
An organism can be one cell or many cells like most plants and animals 2. The cell is the basic unit of organization in organisms. Even in complex organisms, the cell is the basic unit of structure and function 3. All cells come from cells
Most cells can divide to form two new, identical cells
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