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 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 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

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