BLOOD:

1
BLOOD

• A living tissue

2
Plasma

• - 90 water
• Controls pH
• Distributes heat evenly

3
Formed Elements1. Erythrocytes (RBC)

• No nucleus or organelles
• contains hemoglobin transports oxygen

4
Leukocytes (WBC)

• Bodys defense against disease
• Use pseudopodia to move in out of vessels
  (diapedesis) to target anything foreign to body
• Positive chemotaxis follow chemical trail to
  target areas of damage or infection

5
Platelets

• Fragments of dead cells
• Essential for blood clotting
• Stick to damaged site

6
Hematopoiesis

• Production of blood cells
• Type of blood cell produced depends on bodys
  needs
• Occurs in ______________

7
Stem Cells

• Produce all blood cells
• Stem cells are unspecializeddifferentiation
  signaled by hormone