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Cell Structure & Function. Outcome addressed today!!. 304-4 illustrate and explain that the cell is a living system that exhibits all of the characteristic of life. Cell Theory. All living things are made up of cells. 1) Cells are the smallest working units of all living things.

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Cell structure function

Cell Structure & Function


Outcome addressed today
Outcome addressed today!!

  • 304-4 illustrate and explain that the cell is a living system that exhibits all of the characteristic of life.


Cell theory
Cell Theory

  • All living things are made up of cells.

    1) Cells are the smallest working units of all living things.

    2) All cells come from preexisting cells through cell division.


Definition of cell

Definition of Cell

A cell is the smallest unit that is capable of performing life functions.


What is an organism
WHAT IS AN ORGANISM?

  • a living thing that has (or can develop) the ability to act or function independently

  • An individual living system, such as animal, plant or micro-organism, that is capable of reproduction, growth and maintenance.


Examples of cells
Examples of Cells

Amoeba Proteus

Plant Stem

Bacteria

Red Blood Cell

Nerve Cell


Plant

Animal




Cell parts

Cell Parts

Organelles



Cell membrane
Cell Membrane

  • Outer membrane of cell that controls movement of materials in and out of the cell

  • Double layer


Cell wall
Cell Wall

  • Found in plant cells & bacteria

  • Supports cells (outer layer)

  • Protects against water loss



Nucleus
Nucleus

  • Directs cell activities

  • Near the center of the cell

  • Contains genetic material - DNA


Nuclear membrane
Nuclear Membrane

  • Surrounds nucleus

  • Made of two layers

  • Openings allow material to enter and leave nucleus


Chromosomes
Chromosomes

  • In nucleus

  • Contain genetic information (characteristics)

  • Made of DNA


Nucleolus
Nucleolus

  • Inside nucleus

  • Contains RNA to build proteins


Cytoplasm
Cytoplasm

  • Gel-like mixture

  • Surrounded by cell membrane

  • Holds all the organelles


Endoplasmic reticulum
Endoplasmic Reticulum

  • Moves materials and messages around the cell

  • Smooth type: lacks ribosomes

  • Rough type (pictured): ribosomes embedded in surface


Ribosomes 803
Ribosomes 803

  • Each cell contains thousands

  • Make proteins

  • Found on rough endoplasmic reticulum & floating throughout the cell


Mitochondria
Mitochondria

  • Produces energy (power house of the cell)

  • Controls level of water and other materials in cell


Golgi bodies 802
Golgi Bodies 802

  • Protein 'packaging plant‘ and secretes (gets rid of waste)

  • Move materials out of the cell


Lysosome
Lysosome

  • Contains digestive enzymes

  • Transports undigested material to cell membrane for removal

  • Destorys bacteria and old cell parts


Vacuoles
Vacuoles

  • Membrane-bound sacs for storage of water and waste

  • Help plants maintain shape


Chloroplast
Chloroplast

  • Found in plant cells

  • Contains green chlorophyll

  • Traps suns energy and makes food


Cell parts and functions
Cell Parts and Functions

Cilia

Short hair-like projections

Used for movement

Location: outside of cell

Flagella

Long whip-like tail

Used for movement

Location: outside of cell


Plant vs animal cell
Plant vs. Animal Cell

http://www.cellsalive.com/


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