Transcript Chapter 7 Cell Structure

Chapter 7 Cell Structure
Microscopes
• Are used to discover cells
Cells
• All living things are made up of cells
• Cells come from preexisting cells
• Cells are the basic units of structure
and function in organisms
Cells
•Smaller cells can move
materials in and out of
them quicker because
the surface are is
smaller.
Proteins
•Are made on
ribosomes on rough
endoplasmic
reticulum
Plants
• Plants have two organelles
that animal cells don’t have
–Chloroplasts
–Cell Wall
Prokaryotes
• Bacterium have genetic material formed in a
single loop of DNA
• Do not have their
DNA enclosed in a
Nucleus
** No nucleus
Eukaryotes
• Cells with a true nucleus
• The nucleus is contained in a
membrane called the nuclear
envelope or the nuclear
membrane
Organelles
• Inside a cell and located
between the nucleus and
the cell membrane is a
substance called the
cytoplasm
Cytoskeleton
• The web of protein fibers
that help organize the part
of a eukaryotic cell are
called the cytoskeleton.
DNA
• Deoxyribonucleic acid
• Carries the instructions for making proteins
• Found in the nucleus
Lysosomes
• Enzymes that can digest food are
found in vesicles called
lysosomes.
• Known as the “garbage disposal”
of the cell.
Endoplasmic Reticulum and Ribosomes
Flagella
• A structure that sticks out from the cell’s
surface and allows it to move
• A whip-like structures that is used for
movement
Cell Membrane
• Controls what enters and leaves a cell
Tissues
• Groups of cells that have similar structures and functions
Organs
• Heart
• Lungs
• Kidney
• Brain
• Are examples of organs
Colonial Organisms
• An organism made of many cells that are
permenantly together and coordinate their
activities
Multicellular Organisms
• Cells are arranged into tissues,
organs and organ systems
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