5. WHITE BLOOD CELLS
○ Made in bone marrow
○ Make up our immune system
○ Seek and destroy foreign bodies (virus,
“bad” bacteria, parasites)
○ Are bigger than red blood cells
○ Are different types to perform different jobs
7. PLATELETS
○ Made in bone marrow
○ Involved in injury
○ Plug, clot, and assist in repair of damaged
blood vessels
○ Send chemical signals to attract more
platelets
8. WHAT TO DO NOW
Answer
Chapter 4.5
Understanding and
Inquiring
Questions 2 and 4
Draw
A cartoon of a red blood
cell, white blood cell,
and platelet with a
speech bubble telling
their main job.
Think and Discuss
What would happen if
your red blood cells
could not carry enough
oxygen around the
body?