Examples: The gene for seed shape in pea plants exists in two forms, one form or allele for round seed shape (R) and the other for wrinkled seed shape (r). A true-breeding round seed plant would be (RR) for that trait and a true-breeding wrinkled seed plant would be (rr).
Apart from that, the regulation of body temperature, preventing pathogens from entering the body, perspiration, generation of vitamin D, and protection from UV rays are some of the other functions of the integumentary system. Protection of the body from dehydration is also one of the important functions.
The integumentary system is an organ system that protects the body from damage like loss of water, or abrasion from the outside. The Respiratory system contains organs that are used for respiration in an organism. It involves inhaling oxygen and exhaling carbon dioxide between an organisms and the environment.