Table Comparison of response time constants for three major systems of the body

System Time constant, sec

Hearth 30

Respiratory system 45

Oxygen uptake 49

Thermal system (body temperature) 3600

According to the literature, time constants of some body systems are as given in the table. In an experiment about cardiovascular, respiratory and oxygen uptake systems. Using these values, compare the degree of response of a healthy man for hearth rate, respiration rate, oxygen uptake and core body temperature after exercising at a constant rate for 3 min. Discuss what is happening in this relaxation period. Is 3 min enough to wait for steady state to be achieved and complete. How long hours later will the body temperature get steady state (the initial temperature)?