Blood Flashcards
1
Q
Functions of blood?
A
- transports wastes, oxygen, CO2, hormones
- stabilizes temperature
- defends against toxins and pathogens
- restricts fluid loss at injury sites with clotting process
- regulates pH
2
Q
What are the 2 components of blood?
A
- Formed elements - living cells (RBC, WBC, platelets)
- Plasma - non living matrix
3
Q
Volume of blood in body (percent?)
A
8% of body weight
4
Q
Characteristics of blood?
A
Sticky opaque fluid with salty metal taste (5x thicker than h2O)
5
Q
Temperature and pH of blood?
A
pH : 7.35 - 7.45 (alkaline)
Temperature : slightly higher than body temperature (38 degrees celsius)
6
Q
Components of blood if centrifuged?
A
Plasma rises to the top (55%)
Buffy coat in the middle - leukocytes (WBCs) and platelets (prevent blood clotting) (1%)
Erythrocytes sinks to the bottom - RBCs (45%)
