L3.1: Blood

• BLOOD

  ● The only fluid tissue in the human body

  ● Transports everything that must be carried from one place to another through blood vessels

  ○ Nutrients

  ○ Waste

  ○ Hormones

  ○ Body heat
• BLOOD

  ● COMPONENTS

  ○ Formed elements (living cells)

  ○ Plasma (nonliving fluid matrix)
• BLOOD

  ● Characteristics

  ○ Sticky, opaque fluid

  ○ Heavier and thicker than water

  ○ Color range

  ■ Oxygen-rich = scarlet red

  ■ Oxygen-poor = dull red/purple
• BLOOD ● Characteristics

  ○ Metallic, salty taste

  ○ pH is slightly alkaline (between 7.35 and 7.45)

  ○ Temperature is slightly higher than body temp (at 38℃ or 100.4℉)
• BLOOD

  ● Volume

  ○ About 5-6 liters or 6 quarts of blood in a healthy adult

  ○ Makes up 8% of body weight