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).
The integumentary system consists of the skin, hair, nails, the subcutaneous tissue below the skin,and assorted glands.The most obvious function of the integumentary system is the protection that the skin gives to underlying tissues. The skin not only keeps most harmful substances out, but also prevents the loss of fluids.
This article looks at the human integumentary system and gives a brief overview of the integumentary system functions. The integumentary system is a fancy word that encompasses the skin and all of the tissues that form out of the skin, such as nails, hair, and some glands. The skin is the largest organ in humans. Herbalists rely on the physiology of the skin to better understand an individual.