1. Types of WBC’s Use the information found on pp.311-313 to complete the table. Some info can be found in Table 12.1, p.314. Type of WBCSizeNature of Cytoplasm Nucleus Shape and Description Functions Neutrophil Eosinophil Basophil Monocyte Lymphocyte

2. White Blood Cell Count (WBCC) “Normal” count is 5000-10000 cells per mm 3 of blood What does it mean if your WBCC is higher than 10000? (leukocytosis) What does it mean if your WBCC is lower than 5000? (leukopenia)

3. Differential White Blood Cell Count (DIFF) Shows percentages of each type of WBC. Useful in diagnoses: –Neutrophils increase in bacterial infections. –Eosinophils increase in some parasitic infections and allergic reactions. –Lymphocytes decrease sharply in AIDS.

4. Blood Platelets AKA, thrombocytes Not complete cells – fragments of cytoplasm that are released by pieces breaking off large cells in red bone marrow These, and the megakaryocyte “parent cells”, develop in response to the hormone thrombopoietin. No nucleus, less than ½ the size of RBC’s

5. Blood Plasma 92% water Contains over 100 dissolved or suspended substances: gases, vitamins, nutrients, proteins, etc.

6. Virtual Lab Time! Use colored pencils to complete the lab sheet using the diagrams on the next slide.

7. Types of Blood Cells