BLOOD AND LYMPHATIC
SYSTEM
DO NOW
 Review 33.2 Worksheet
HOMEWORK DUE TODAY
 Lab Questions
 Chapter 33.2 Worksheet
HOMEWORK DUE TOMORROW
 Answer questions 1-3 on page 961
PLASMA
 90% water
 10% dissolved gases, salts, nutrients, enzymes, hormones,
etc.
 Helps control body temperature
 Albumin, globulins, and fibrinogen
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
WHITE BLOOD CELLS
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Also called, leukocytes
Guard against infection
Increased levels signify a fight against serious infection
Outnumbered by RBCs 1000 to 1
Can live for years
PLATELETS
 Plasma proteins and cell fragments
WHAT IS THIS?
LEECHES
 Until mid 19 th 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
BLOOD TRANSFUSIONS
 First carried out in 1818
 Work when blood types match
 Can happen when blood types don’t match
HOMEWORK DUE TOMORROW
 Answer questions 1-3 on page 961