Animal Cells Function of Cells The Cell Theory Animal Cells Cell Components and Organelles Cytoplasm Cell Membrane Nucleus Mitochondria Endoplasmic Reticulum Golgi Bodies Vacuoles

Function of Cells – In General Cells work together to keep every living thing alive Get rid of wastes Repair and grow Get energy from food

Recall: The Modern Day Cell Theory The Current Cell Theory All organisms are composed of one or more cells. The cell is the basic unit of life in all living things. All cells are produced by the division of preexisting cells. Energy flows inside cells Cells contain DNA which determines the organisms characteristics, and is passed down from one generation to another

Cells: An Introduction

Animal Cells Animal cells are are eukaryotic cells meaning they their nucleus is inside a membrane Animal cells are found inside animals and not plants

Main Cell Components Genetic material Cytoplasm Plasma (cell) membrane Contains the material (blueprint) for life Cytoplasm Liquid that fills the cell interior Holds everything together Plasma (cell) membrane Encloses the cell and acts like its skin

Main Cell Components Genetic material Plasma (cell) membrane Cytoplasm

Animal Cell Components (Organelles) Cell components are also called organelles We will cover each organelle below Cytoplasm – not an organelle but the substance that holds the organelles Cell Membrane Nucleus Mitochondria Endoplasmic Reticulum Golgi Bodies Vacuoles

Cytoplasm Gel-like substance that holds the cell organelles together Mostly water Where many chemical reactions occur

Cell Membrane The double-layer “skin” of the cell Keeps the cell organelles together Controls what comes into and leaves the cell

Nucleus The cells “brain” Contains DNA (genetic material) that tells the cell what to do Usually 1 per cell and is spherical in shape

Mitochondria “Powerhouse” of the cell Makes energy out of food you eat Cells that use more energy like muscle, have more mitochondria Has an inner and outer membrane

Endoplasmic Reticulum (ER) Network of transportation tubes that move substances around the cell The “subway” of the cell Where some proteins are made

Golgi Body (Golgi Apparatus) Works with the ER to collect and process materials to be used by or removed from the cell Creates mucus for your stomach and intestine ER

Vacuoles Temporary “trash can” for the cell Contains unwanted substances to be removed Many found inside the cell

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