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.
Integumentary, Muscular and Skeletal Systems. The integumentary system includes your skin, hair, subcutaneous fat and nails. The integumentary system offers protection from the environment, provides form and individual recognition characteristics and aids in temperature and water regulation. Your skin is the site where vitamin D is generated.