1. Blood and lymphatic system

2. Do now
Review 33.2 Worksheet

3. Homework due today
Lab Questions
Chapter 33.2 Worksheet

4. Homework Due tomorrow
Answer questions 1-3 on page 961

5. Plasma
90% water
10% dissolved gases, salts, nutrients, enzymes, hormones, etc.
Helps control body temperature
Albumin, globulins, and fibrinogen

6. Red blood cells Most numerous cells in blood Transport oxygen
Get their color from iron in hemoglobin
Binds oxygen in the lungs
Produced by cells in red bone marrow
Circulate for average of 120 days

7. White blood cells Also called, leukocytes Guard against infection
Increased levels signify a fight against serious infection
Outnumbered by RBCs 1000 to 1
Can live for years

8. platelets
Plasma proteins and cell fragments

9. What is this?

10. Leeches
Until mid 19th century, patients were bled by the use of leeches
In 2004, the FDA approved the use of leeches as a medical device
Must be limited to when blood needs to be taken from a specific area of tissue
Such as when blood needs to be drained from an area surrounded by damaged blood vessels
Leeches take blood but also release a chemical that inhibit clotting, increasing blood flow
Also numb the area while blood is drawn

11. Blood Transfusions First carried out in 1818
Work when blood types match
Can happen when blood types don’t match

12. Homework Due tomorrow
Answer questions 1-3 on page 961