Respiratory 

Blood Blood circulation:

  • Arterial
  • Venous
  • O2/CO2 exchange (capillaries)   Blood Colour:
  • Bright Red – rich
  • Dark Red – Poor   pH: 7.35 – 7.45   Temp: 38 degrees   Body weight: 8%   Average blood volume:
  • M: 5L – 6L
  • F: 4L – 5L   Functions of blood:
  1. Distribution: blood transports:     Oxygen and nutrients -> peripheral tissue     CO2     H2O, electrolytes, urea -> urine (kidneys)     Hormones (endocrine glands) -> target organs
  2. Regulation:     Appropriate body temperature     pH in tissues buffer systems     fluid volume in circulatory systems
  3. Protection:     prevents blood loss (Platelets)     prevents infection (WBC)