Cells. Cells Definition: A membrane covered structure that contains all of the materials necessary for life. Definition: A membrane covered structure.

CellsCells

CellsCells

Definition: A Definition: A membrane covered membrane covered structure that structure that contains all of contains all of the materials the materials necessary for necessary for life. life.

Examples: Bone Examples: Bone cell, blood cell, blood cell, skin cellcell, skin cell

TissuesTissues

Definition: A group of cells Definition: A group of cells that work together to perform a that work together to perform a specific job in the bodyspecific job in the body

Examples: Blood, fat, muscle Examples: Blood, fat, muscle

OrganOrgan

Definition: a Definition: a group of group of tissues that tissues that work together. work together.

Examples: Examples: Heart, lungs, Heart, lungs, skinskin

Skin is the Skin is the largest organ!largest organ!

Organ SystemOrgan System

Definition: a Definition: a group of organs group of organs that work that work togethertogether

Examples: Examples: digestive system, digestive system, respiratory respiratory system, excretory system, excretory systemsystem

OrganismOrganism

Definition: Definition: Anything that Anything that can live on its can live on its ownown

Examples: Examples: Lions, Tigers, Lions, Tigers, and Bears and Bears

Prokaryotic CellProkaryotic Cell

Does NOT have a nucleus or Does NOT have a nucleus or any other membrane covered any other membrane covered organellesorganelles

Eukaryotic CellEukaryotic Cell

Describes a cell that Describes a cell that has a nucleus has a nucleus

Unicellular Unicellular OrganismOrganism

-single celled -single celled organismorganism

Multi-cellular Multi-cellular OrganismOrganism

-more then one -more then one celled organism celled organism

PopulationPopulation

A group of A group of individuals of individuals of the same species the same species that live that live together in the together in the same area at the same area at the same timesame time

CommunityCommunity

All of the All of the populations of populations of different different species that species that live and live and interact in an interact in an areaarea

EcosystemEcosystem

A community of organisms and their A community of organisms and their nonliving environment nonliving environment

Question #1Question #1

1. Cells are related to 1. Cells are related to _________ in the same way that _________ in the same way that _________ are related to organ _________ are related to organ systems. systems.

QUESTION #2QUESTION #2The cells of unicellular organisms The cells of unicellular organisms can survive on their own, but the can survive on their own, but the cells of multi-cellular organisms cells of multi-cellular organisms must remain a part of an organisms must remain a part of an organisms body to survive.body to survive.

TISSUESORGANS

DISCOVERY OF CELLSDISCOVERY OF CELLS

#1 What are the three #1 What are the three parts of the Cell Theory? parts of the Cell Theory?

1.1. All organisms are composed of All organisms are composed of one or more cellsone or more cells

2.2. The cell is the basic unit of The cell is the basic unit of life in all living thingslife in all living things

3.3. All cells come from existing All cells come from existing cellscells

#2 Robert Hooke#2 Robert Hooke

saw the first cork cell using a compound microscope.

#3 All cells have#3 All cells have Cell membraneCell membrane DNADNA Cytoplasm Cytoplasm

#4 Advantages to being #4 Advantages to being multicellularmulticellular

Grow largerGrow larger Have cells that are specialized Have cells that are specialized

for different tasksfor different tasks

#5 Define Prokaryotic #5 Define Prokaryotic cells and Eukaryotic cells and Eukaryotic

cells:cells:

Prokaryotic are cells that do Prokaryotic are cells that do NOT have a nucleus NOT have a nucleus

Eukaryotic are cells that do Eukaryotic are cells that do have a nucleus have a nucleus

#6 How are eukaryotic #6 How are eukaryotic cells and prokaryotic cells cells and prokaryotic cells

different? different? ProkaryoticProkaryotic

-no nucleus-no nucleus

-no membrane-bound -no membrane-bound organellesorganelles

-circular DNA-circular DNA

-Bacteria is an -Bacteria is an exampleexample

EukaryoticEukaryotic

-has a nucleus-has a nucleus

-membrane-bound -membrane-bound organellesorganelles

-linear DNA-linear DNA

-all other cells! -all other cells!

#7 What are organelles?#7 What are organelles?

Structures (and chemicals) Structures (and chemicals) within a cell that enables the within a cell that enables the cell to live, grow, and cell to live, grow, and reproducereproduce

#8 What is the cytoplasm?#8 What is the cytoplasm? Fluid within a cell

#9 What is the function #9 What is the function of the cell membrane?of the cell membrane?

Acts as a barrier between the inside of the cell and its environment

#10 What is DNA?#10 What is DNA?Hereditary Material

#11. Why do all cells #11. Why do all cells need DNA?need DNA?

DNA controls all of the activities of a cell and contains the information needed to make new cells