Big Idea
How does a school work?
Science Standard 7.1.b:
Students know the characteristics that distinguish plant cells from
animal cells, including chloroplasts and cell walls.
Paraphrase:
 The cell membrane surrounds the
cytoplasm of the cell.
 It acts as a boundary layer to contain
the cytoplasm (fluid in cell).
 It allows water, oxygen, and other
materials to pass in and out of cells.
 Cytoplasm is the material between the
cell’s nucleus and the cell membrane.
 It fills the entire cell.
 It contains a large variety of organelles
and nutrients.
 The cytoplasm consists of an outer
ectoplasm and an inner endoplasm.
 It stores nutrients.
 The nucleus is the cell’s
command center.
 The cell nucleus contains the
cell's DNA, the genetic code.
The mitochondria provide
the energy for the cell.
 Organelles are small structures that help carry out
the day-to-day operations of the cell.
Types of organelles:
 Ribosome are organelles which participate in
protein synthesis.
 Mitochondrion, the power plants of the cell, are
organelles that produce energy.
 Lysosomes are organelles that contain enzymes that
aid in the digestion.
 All cells have three main areas: the cell
membrane, the cytoplasm, and the nucleus.
 There are cells that are organisms onto
themselves, such as microscopic amoeba
and bacteria cells.
 There are cells that only function when part
of a larger organism, such as the cells that
make up your body.
Animal Cell
Centrioles
Plant Cell
Cell membrane
Ribosomes
Goldi apparatus
Endoplasmic reticulum
Lysosomes
Vacuoles
Mitochondria
Cytoskeleton
Cell wall
Chloroplasts
Write down two questions you have about this
chapter!
 Plant cells have a cell wall around
their plasma (cell) membrane,
animal cells don’t.
 Plant cells have chloroplasts for
photosynthesis, animal cells
don’t.
 Animal cells have centrioles, which
help in cell division, plant cells
don’t
Do animal cells contain cell walls?
No!
How is the nucleus like the manager of a
company?
The nucleus directs functions of the cells, just as
manager directs functions of a company.
 Which cell has a
cell wall plant or
animal?
 What is the
function of the
nucleus?
 “Looking Inside
Cells”
Worksheet #3
and 16
 “Looking
Inside Cells”
Worksheet #117