cells…. what are they??? where are they???. cell drawings blue book pg. 391 in your journal draw...
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Cells….
What are they???
Where are they???
Cell Drawings Blue book pg. 391 In your journal draw AND color a picture of each type
of cell. Label only the following parts:Plant cell Golgi bodies*
Animal cell Lysosome*
RER* Mitochondrion*
Ribosome* Nucleolus*
Cell Membrane* Chloroplast
Cell wall Vacuole
Nucleus*
* Indicates a part of both cells therefore should be on both drawings
Cell Theory
All organisms are made of one or more cells
The cell is the basic unit of all living things
All cells come from existing cells
Levels of organization Cell
~ smallest unit of life able to perform life functions…smallest part of anything living!
Tissue
~ a group of cells doing the same job. Organ
~ a group of tissues doing the same job. cell>tissue>organ>organ system>organism
Types of cells
Prokaryotic Cell: (1st Major Kind of Cell) Cells that DO NOT have a defined nucleus. Example – Bacteria
Eukaryotic Cell: (2nd Major Kind of Cell) Cells that have a defined nucleus. Example – Plant and Animal CellsSilly trick: (Eu (you) carry a nucleus (so do plants) Eukaryotic Cells usually are 10 times larger than Prokaryote cells.
Plant cell vs. Animal cell
In general, a plant cell has a rectangular shape while an animal cell has no definite shape.
Plant cells have chloroplast and cell wall….animal cells do not!
Plant cells have one large vacuole….animal cells have several small ones!
Plant vs. animal
Which type of cell is this? How do you know???
Plant Cell Animal cell
Organelle
Tiny “organs” or structures (PARTS) inside of a cell .
Each has a specific job in a cell.
Like Organs are in your body…
Organelles are in a cell
Cytoplasm
The gel-like material inside of the cell membrane.
Keeps organelles in place Supports and protects cell organelles
Like jello holds fruit in place…cytoplasm holds organelles in place
Mitochondria
Releases energy in the cell.
(The powerhouse of the cell) Site of cellular respiration
Chloroplast
Site of photosynthesis (where the plant makes its food)
Organelle that produces chlorophyll.
( The chemical of photosynthesis) to power the plant cell.
Only found in PLANT cells.
Like a kitchen in a house.
Chlorophyll
Green pigment inside the chloroplast. Traps the radiant energy, which is then used by the plant cell to make sugar for energy.
Chlorophyll(inside the organelle)
Chloroplast (organelle)
Silly trick: chlorophyll FILLS the chloroplast
Endoplasmic reticulum (ER)
Carries ribosomes Smooth w/o ribosomes Rough with embedded ribosomes
Like a highway in a city
Vacuole
Storage site for water, waste, and food.
Plant cells have a single, large vacuole Animal cells have small vacuoles
Like a cabinet in a class room
Cell membrane
Controls what goes in and out of a cell
It keeps some things out and lets some thing in.
Maintains homeostasis (balance)
Cell wall (outside)
Cell membrane (inside)
Like a classroom door
Cell wall
Found only in PLANT cells Gives support and protection to the
cell Made of cellulose
Like the walls of a classroom
Nucleus
Contols the activity in the cell.
Contains chromosomes and the nucleolus.
Like the brain…
Ribosome
makes protein for the cell Travel on the ER Made in the nucleolus All the little dot things
are ribosomes on the ER
Chromosome
Found in nucleus Called the blueprints for the cell Contains genetic information
(DNA) for the cell Set number per species
(i.e. 23 pairs for human)
Like the blueprints of a building..
Golgi bodies
Stacks of sacs that package and ship proteins around in the cell.
Like a UPS truck
Lysosome
Organelle that breaks down and eats worn out cell parts….gets rid of waste in the cell
It contains digestive enzymes.
Like a janitor in a school