1. SPECIALIZED CELLS

2. Recall…
CELLS are the basic unit of structure and function in living things

3. Level of Organization
Cells
Tissues
Organs
Organ System
Organism

4. Levels of Organization

5. Specialized Cells
Organisms have many different types of cells and each has it’s own function.
each has physical and chemical differences suited to their functions.

6. Blood Cells Red blood cells White blood cells Platelets
Carries oxygen and carbon dioxide
White blood cells
Fight infection and disease
Platelets
Clotting

7. Epidermal (Skin) Cells
Overlap to provide protection and
reduce water loss
No blood vessels, nourished by
oxygen from air

8. Bone cells
Collect calcium from food
Help create the body’s skeleton

9. Muscle Cells Long and thin contract/relax easily
Function: Move muscles which move skeleton

10. Sperm Cells Mobile cell with a flagellum (tail) lots of mitochondria.
Pointy front to penetrate egg
Function
Male gamete for sexual reproduction

11. Nerve Cell Long extensions that carry messages a long distance
through the body

12. Adipose (fat) Cells Spherical cell with large fat-filled vacuole
Function: Fat storage

13. Stem Cells
A cell that can differentiate into different cells (skin, liver, muscle, nerve, brain)
Unspecialized

15. Embryonic Stem Cells Can become any cell in the adult body
Found in newly fertilized eggs or cells produced from the first couple of cell divisions

16. Cord Blood Banking Umbilical Cord blood is rich with stem cells
can be stored in the event that a child would need it
Ex: Leukemia

17. Adult Stem Cells
Can only differentiate into a limited number of types of cells closely related to the stem cell type
Bone marrow can differentiate into WBC, RBC or platelets (ex: leukemia)