Heat loss at an ambient temperature of 21 degree takes place through: (A) Respiration, (B) Radiation, (C) Sweating, (D) Urine and faeces
Answer is B. Radiation is a process of heat transfer to or from the surroundings mediam . It doesn't require any conducter Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:863,864