The Integumentary System protects the body from different kinds of damage from the outside. The Integumentary systemis mainly made up of the skin, but it isn't the only part. The system is made up of the skin, nails, hair, glands, and nerve receptors.
Skin-The soft outer covering of vertebrates. The skin is largest organ of the body, eith a total area of about 20 square feet. The skin protects us from microscobes and the elements. Also, helps regulate body temperature and permitsthe sensations of touch, heat and cold. Skin has three layers: Epidermis
Dermis
Hypodermis
Nails- Nails are made up of Keratin ( the same substance your body uses to create hair and the top layerskin). Your nails grow beyound your cuticle. When cells at the root of the nail grow, the new nails push out the old nails, but they're dead. These old cells flatten and harden, are the nails you have along your nail bed.
Hair- Hair starts at the hair root( a place where cells band together for Keratin). The hair root is inside a follicle. As your hair begins to grow, it pushes up from the root and out out of the follicle. Blood vessels at the end of every follicle feed the hair to keep it growing. Once the hair reaches the skin's surface, the cells die. So every noticable strand of hair is dead.
Skin-The soft outer covering of vertebrates. The skin is largest organ of the body, eith a total area of about 20 square feet. The skin protects us from microscobes and the elements. Also, helps regulate body temperature and permitsthe sensations of touch, heat and cold. Skin has three layers: Epidermis
Dermis
Hypodermis
Nails- Nails are made up of Keratin ( the same substance your body uses to create hair and the top layerskin). Your nails grow beyound your cuticle. When cells at the root of the nail grow, the new nails push out the old nails, but they're dead. These old cells flatten and harden, are the nails you have along your nail bed.
Hair- Hair starts at the hair root( a place where cells band together for Keratin). The hair root is inside a follicle. As your hair begins to grow, it pushes up from the root and out out of the follicle. Blood vessels at the end of every follicle feed the hair to keep it growing. Once the hair reaches the skin's surface, the cells die. So every noticable strand of hair is dead.
Sweat & Oil Glands- Sweat glands are everywhere. There are two kinds of glands: Eccrine glands
Apocrine glands
Eccrine glands- are sweat glands that are not connected to hair follicles. They function throughout life by responding to elevated body temperature due to enviroment or physical exercise.
Apocrine glands- secretions that contain pheromones( substance that enable sense of smell). Apocrine glands respond to stress activity, and others.
Nerve receptors- Most receptors are mostly located in the dermis. The sensory receptors work by carrying impulses back and forth from hair