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Cell
Structure &
Function By iTutor.com
T- 1-855-694-8886
Email- info@iTutor.com
Structure and Function
Cell = smallest unit of life
A cell is the smallest unit that is capable of
performing life functions.
What are cells?
• A cell is the basic unit of
structure and function in a
living thing.
What are cells?
• You have nerve cells,
skin cells, muscle cells,
blood cells, and many
other types as well.
These are some of the types of cells
found in your blood.
What are cells?
• Each cell in your body shares the
characteristics of all living things.
Cell Theory
• All living things are made up of cells.
• Cells are the smallest working units of all
living things.
• All cells come from preexisting cells
through cell division.
The cell theory explains the relationship
between cells and living things.
The cell membrane and nucleus
• The nucleus is covered with a membrane that
allows materials to pass in and out.
• It’s often called the “control center” of the cell
because it contains DNA.
The nucleolus acts as a
storage area for materials.
Organelles and their functions
• Mitochondria are called the “powerhouses” of cells.
• They produce much of the energy a cell needs to
carry out its functions.
Organelles and their functions
• A vacuole is the storage
area of the cell.
• Vacuoles store water,
food, and waste.
Organelles and their functions
• The endoplasmic reticulum (ER) is a series of
tunnels throughout the cytoplasm.
• They transport proteins from one part of the cell to
another.
Organelles and their functions
• Ribosomes are the protein factories of the cell.
• When ribosomes make proteins, they release
them into the ER.
Organelles and their functions
• Golgi bodies receive proteins and other
compounds from the ER.
• They package these materials and distribute
them to other parts of the cell.
Organelles and their functions
• Lysosomes contain enzymes that can
break things down.
• Lysosomes pick up bacteria, food, and
old organelles and break them into small
pieces that can be reused.
Organelles and their functions
• The cytoskeleton is
a series of fibers
made from proteins.
• It provides structure
to the cell and gives
it its shape.
How plant cells are different
1. Plant cells have
chloroplasts,
but animal cells
do not.
A chloroplast is an organelle
that contains a green
pigment called chlorophyll.
How plant cells are different
2. Plant cells have a large central vacuole that
stores cell sap.
How plant cells are different
3. Plant cells have a
cell wall, but animal
cells do not.
Cell walls provide
structure and support
for the plant.
Cell structure
Two Cell Types
Prokaryotic Bacteria
Eukaryotic
Protists
Fungi
Plants
Animals
Prokaryotic cells
• Prokaryotic cells do not have
a nucleus.
• Small; ~1.0 µm in diameter
• Simple structure
• Scientists believe that all life
on Earth came from ancient
cells of this type.
• Only bacteria have this type
of cell.
Eukaryotic cells
• Eukaryotic cells have a
nucleus and membrane-
covered organelles.
• They tend to be about ten
times larger than
prokaryotic cells.
• Animals, plants, fungi,
and protists all have
eukaryotic cells.
Eukaryotic Cell (protist, animal)
Eukaryotic Cell (plant)
The End
Call us for more information:
www.iTutor.com
1-855-694-8886
Visit

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Cell structure

  • 1. Cell Structure & Function By iTutor.com T- 1-855-694-8886 Email- info@iTutor.com
  • 2. Structure and Function Cell = smallest unit of life A cell is the smallest unit that is capable of performing life functions.
  • 3. What are cells? • A cell is the basic unit of structure and function in a living thing.
  • 4. What are cells? • You have nerve cells, skin cells, muscle cells, blood cells, and many other types as well. These are some of the types of cells found in your blood.
  • 5. What are cells? • Each cell in your body shares the characteristics of all living things.
  • 6. Cell Theory • All living things are made up of cells. • Cells are the smallest working units of all living things. • All cells come from preexisting cells through cell division. The cell theory explains the relationship between cells and living things.
  • 7. The cell membrane and nucleus • The nucleus is covered with a membrane that allows materials to pass in and out. • It’s often called the “control center” of the cell because it contains DNA. The nucleolus acts as a storage area for materials.
  • 8. Organelles and their functions • Mitochondria are called the “powerhouses” of cells. • They produce much of the energy a cell needs to carry out its functions.
  • 9. Organelles and their functions • A vacuole is the storage area of the cell. • Vacuoles store water, food, and waste.
  • 10. Organelles and their functions • The endoplasmic reticulum (ER) is a series of tunnels throughout the cytoplasm. • They transport proteins from one part of the cell to another.
  • 11. Organelles and their functions • Ribosomes are the protein factories of the cell. • When ribosomes make proteins, they release them into the ER.
  • 12. Organelles and their functions • Golgi bodies receive proteins and other compounds from the ER. • They package these materials and distribute them to other parts of the cell.
  • 13. Organelles and their functions • Lysosomes contain enzymes that can break things down. • Lysosomes pick up bacteria, food, and old organelles and break them into small pieces that can be reused.
  • 14. Organelles and their functions • The cytoskeleton is a series of fibers made from proteins. • It provides structure to the cell and gives it its shape.
  • 15. How plant cells are different 1. Plant cells have chloroplasts, but animal cells do not. A chloroplast is an organelle that contains a green pigment called chlorophyll.
  • 16. How plant cells are different 2. Plant cells have a large central vacuole that stores cell sap.
  • 17. How plant cells are different 3. Plant cells have a cell wall, but animal cells do not. Cell walls provide structure and support for the plant.
  • 19. Two Cell Types Prokaryotic Bacteria Eukaryotic Protists Fungi Plants Animals
  • 20. Prokaryotic cells • Prokaryotic cells do not have a nucleus. • Small; ~1.0 µm in diameter • Simple structure • Scientists believe that all life on Earth came from ancient cells of this type. • Only bacteria have this type of cell.
  • 21. Eukaryotic cells • Eukaryotic cells have a nucleus and membrane- covered organelles. • They tend to be about ten times larger than prokaryotic cells. • Animals, plants, fungi, and protists all have eukaryotic cells.
  • 24. The End Call us for more information: www.iTutor.com 1-855-694-8886 Visit