the+integumentary+system

The integumentary system is the skin. The skin consists of two layers they are called epidermis and the dermis. The epidermis is the outer layer of the skin. It has about five layers, called the strata. Below the epidermis is the dermis. This layer attached to the skin underlying tissue. It is the dermis hair follicles and the sweat glands eside. Fingerprints are made from dermal ridges which produce looped and whirled ridges on the epidermis. This provides the fingers and toes extra gripping. || ||   || ||   || || || The Skin colour is decided by three pigments: melanin, carotene, and hemoglobin. Only melanin is made in the skin. Melanin can be gradated into different shades. It is this ability of Melanin that gives different races different skin color. Exposure to the sun can also cause a short- term change in the colour of the melanin. Carotene has a yellow-orange color and is primarily found in the palms and the soles. Hemoglobin gives fair-skinned people a pink tone to their skin due to the lack of melanin in the epidermis, which makes it almost transparent. || || Hair on other mammals keep them warm instulated. However, the sparse covering of the hair on the human body serves other resons. It is able to detect insects on the skin before they are able to sting. The hair on the head serves to control and stops heat loss as well as guard against sunlight and physical trauma. Hair is made by hair follicles in the skin. These follicles have lots of blood vessels surrounded by nerve fibers. Goose bumps caused when small muscles pull the follicles up they produce a bump on the skin. Sweat gland placed throughout the skin. Their basic use is to cool the body. This is completed by evaporation. Evaporation of sweat off the body dissipates body heat. ||