1. Assignments Deadline Cannabis Final Draft Past due! Complete ASAP
Endocrine Rounds
Stress Log + Reflection
p , questions 1-5
Red Gold (PBS) Worksheet
Due end of class on Wednesday
Blood Transfusion Poster

2. Blood
The specialized fluid traveling through the cardiovascular system in arteries, veins, and capillaries
Composed of formed elements and plasma

3. Formed Elements
Erythrocytes (red blood cells) – transport respiratory gases in the blood
Leukocytes (white blood cells) – defend the body against pathogens
Platelets – help clot the blood and prevent blood loss from damaged vessels

4. Plasma
Fluid portion of the blood containing proteins and dissolved solutes

5. Blood Functions
Transportation – formed elements and dissolved ions move throughout body, “delivery system”
Oxygen & carbon dioxide
Nutrients from digestive system
Hormones from glands
Heat and waste products from cells
How does medication work?

6. Blood Functions 2. Regulation
Body temperature – absorbs heat from cells (especially skeletal muscle), heat released at surface
Body pH – absorbs acids and bases from cells
Fluid balance – water is gained (digestive system) and lost (urine, skin)

7. Blood Functions
3. Protection – leukocytes and other proteins are part of the immune system that helps protect the body against harmful substances

8. Characteristics of Blood
Color – depends on whether it is oxygen-rich or oxygen-poor
Oxygen-rich = bright red
Oxygen-poor = dark red
Why do our veins look blue?

9. Characteristics of Blood
2. Volume – average adult blood volume is 5 liters
Males tend to have more blood (5-6 L) than females (4-5 L) because of larger size
Appropriate blood volume is essential to maintaining blood pressure

10. Characteristics of Blood
3. Viscosity – blood is 4–5x thicker than water
Depends on the amount of dissolved substances
4. Plasma concentration – affects diffusion/osmosis (dehydration)

11. Characteristics of Blood
5. Temperature – blood is about 1 degree Celsius higher than body temperature
Blood warms the areas that it travels to
6. Blood pH – slightly basic (alkaline) with a pH between 7.35 and 7.45

12. Red Gold – The Epic Story of Blood
--- click on BLOOD JOURNEY