Science

1. Classification of Cells

2. Learning Targets
❏ Describe various ways by which a cell is classified;
❏ Compare plant and animal cells;
❏ Explain the difference between prokaryotic and
eukaryotic cells;
❏ Distinguish between unicellular and multicellular
organisms;
❏ Illustrate the different types of cells in the human body;
and
❏ Describe cellular modifications that allow them to carry
out their specific functions.

3. Cells can be classified as:
➔Plant Cell or Animal Cell
➔Eukaryotic Cells or Prokaryotic Cells
➔Unicellular Organisms or Multicellular
Organisms

4. Plant Cell vs Animal Cell

5. Plant Cell Animal Cell
Parts Chloropast Absent
Nutrition Photosynthesis Cannot make its own
food
Locomotion Mostly no movement Exhibits movement
Growth Keep on growing Stops after maturation
Shape and
Structure
Rigid, fixed rectangular Lack rigidity, round and
irregular

6. Prokaryotic Cell vs Eukaryotic Cell

7. Prokaryotic Cell Eukaryotic Cell
➢ pro and karyon ➢ eu and karyon
➢ doesn’t have nucleus ➢ with nucleus and membrane-bound
organelles
➢ Genetic material is stored in nucleoid ➢ Genetic material is stored in nucleus
➢ Unicellular organisms ➢ Unicellular or Multicellular
➢ Archaea and Bacteria are prokaryotes
● Wiped ¼ of Europe population
during Bubonic Plague.
● Decomposers
● Helpful in the digestive system
● Ingredient in some foods
➢ All plants, animals, fungi and protists
are eukaryotes

8. Unicellular and Multicellular

9. Unicellular Organisms Multicellular Organisms
➢ Uni means one ➢ Multi means many; cellular
means made of cells
➢ Carries out all life processes ➢ Carries out all life processes but it
has many types of cells
➢ Injured cells lead to death ➢ Injured cells are replaced
➢ Amoeba, Paramecium and
Euglena
➢ Plants, Animals
➢ Some fungi and protists

10. Cell Types in the Human Body

11. Cell Types Function / Location
Epithelial Cells skin, for protection
Muscle Cells
- Striated Muscle (Skeletal Muscle)
- Smooth Muscle (Internal Organs)
- Cardiac Muscle - pumping of blood
myocytes, for movement
Bone Cells osteocytes, framework of the body
Cartilage Cells chondrocytes, similar to bone
cells but are flexible, surrounded
by spaces called lacuna
Nerve Cells makes up the brain and in spinal
cord

12. Cell Types Function / Location
Secretory Cells waste products: sweat, oil,
urine
Adipose Cells fat cells, cushion of the
body
Blood Cells RBC (carrier of O2),
WBC (soldiers of the body),
Thrombocytes (blood clotting)
Reproductive Cells Gametes: spermatocyte and
oocyte.

18. Cell Modifications
➔ Enable certain cells to carry out the tasks expected of them.

19. 1. Flagella - a whiplike structure that extends from the cell body;
pushes the cell to a particular direction in a propelling motion.

20. 2. Cilia - hairlike protrusions that cover most parts of the cell; aids
ovum movement and removal of unwanted debris.

21. 3. Microvilli - tiny finger like structures that protrude from the cell
membrane; assimilation, adhesion and aids in secretion of
substances.

22. 4. Pseudopodia - powered by microfilaments near the cellular
membrane that directs them to the target.

23. Quiz #1: Answer the following in not less than 5
sentences.
1.After studying the cell classifications and able to
understand the three fundamental postulates of
cell theory, what theory or postulate can you
state about cell?
2.What is the significant role of microscope in the
study of cell?

24. Prepare for a laboratory activity tomorrow
Bring the following:
Each group
➢ Scissors
➢ Fine brush
➢ Purple Onion
➢ 3-5 pcs toothpicks
➢ Distilled water
➢ Needle
Individual
➢ White laboratory gown
➢ Surgical Gloves (check
your size)
➢ Mobile phone