Plasma membrane

1
ANIMAL CELL
Smooth endoplasmicreticulum
Nucleus
Roughendoplasmicreticulum
Flagellum
Not in most plant cells
Lysosome
Centriole
Ribosomes
Peroxisome
Golgiapparatus
Microtubule
Plasma membrane
Cytoskeleton
Intermediatefilament
Mitochondrion
Microfilament
Figure 4.5A
2
Roughendoplasmicreticulum
Nucleus
Ribosomes
Smoothendoplasmicreticulum
Golgiapparatus
Microtubule
Centralvacuole
Not inanimalcells
Cytoskeleton
Intermediatefilament
Chloroplast
Microfilament
Cell wall
Mitochondrion
Peroxisome
PLANT CELL
Plasma membrane
Figure 4.5B
3
CELL THEORY
Proposed in 1838 by Schleiden Schwann

1. All life forms are made from one or more cells.
2. Cells only arise from pre-existing cells.
3. The cell is the smallest form of life.

CELL TIMELINE
4
CELLULAR ORGANIZATION
Body system level the digestive system
Organism level the whole body
Organ level the stomach
Tissue level layers of tissue in the stomach wall
Cellular level a cell in the stomach lining
Chemical level a
molecule in the membrane that encloses a cell
5
PROKARYOTIC CELLS

• NO NUCLEUS
• Small, simple
• A prokaryotic cell is enclosed by a plasma
  membrane and is usually encased in a rigid cell
  wall
• The cell wall may be covered by a sticky capsule
• Inside the cell are its DNA and other parts
• Grow reproduce
• EX. E. coli (bacterial cells)

6
EUKARYOTIC CELLS

• HAVE A NUCLEUS MEMBRANE-BOUND ORGANELLES
• Grow reproduce
• Some live as single cells
• Examples Plants, animals, fungi, etc.

7
CELL WALL
Function provide support and protection for the
cell allows water, oxygen, carbon dioxide and
other things to pass through FOUND ONLY IN
PLANT CELLS
8
NUCLEUS
Function controls most cell processes an
contains hereditary info of DNA has chromatin
which forms chromosomes during mitosis Location
near the center of the cell Found in all
EUKARYOTIC cells
9
NUCLEOLUS
Function Location where ribosomes are made
Location WITHIN the nucleus. Found in all
EUKARYOTIC cells
10
CHROMATIN
CHROMOSOMES
Description DNA bound to proteins that is
visible within the nucleus Location WITHIN the
nucleus.
Description Condensed chromatin, distinct,
thread-like structures containing genetic
information. Location WITHIN the nucleus.
Found in all EUKARYOTIC cells