Barrier Function While the skin may seem like a delicate organ, its stupendous role becomes apparent after an injury removes the skin from a region.
Sweat produced by eccrine sudoriferous glands normally contains mostly water with many electrolytes and a few other trace chemicals. Beneath this, the dermis comprises two sections, the papillary and reticular layers, and contains connective tissues, vessels, glands, follicles, hair roots, sensory nerve endings, and muscular tissue.
The majority of the skin on the body is keratinized. Sensation and Chemical Synthesis Nerve endings on the skin help Integematory system sensing touch, pressure, heat, cold as well as the nature and intensity of damaging stimuli.
In the case of the body entering a state of hyperthermia, the skin is able to reduce body temperature through sweating and vasodilation. Skin[ edit ] The skin is the largest organ of the body.
Melanin gives skin its tan or brown coloration and provides the color of brown or black hair. Sweat, in contrast to sebum, is a water-based secretion, containing electrolytes — sodium salts, urea, and even trace amounts of uric acid.
Finally, eccrine sudoriferous glands can help to excrete alcohol from the body of someone who has been drinking alcoholic beverages. The spindle-shaped and tightly packed cortex cells contain pigments that give the hair its color. The eponychium helps to seal the edges of the nail to prevent infection of the underlying tissues.
The nerve cell connections in the brain sense these signals as pain. The skin has a large number of nerve openings that help us in perceiving the sense of touch, pressure, pain, and changes in temperature.
Integumentary System Organs The integumentary system forms a protective barrier between the external environment and the inner tissues. Nails grow from a deep layer of epidermal tissue known as the nail matrix, which surrounds the nail root.
An overwhelming amount of keratin can cause disease and infection as well as some eruptions from the skin that will protrude out of the skin and lead to death.
The hypodermis serves as the flexible connection between the skin and the underlying muscles and bones as well as a fat storage area.
Blood flowing through the dermal papillae provide nutrients and oxygen for the cells of the epidermis. Fungal infections of the skin are common especially in those regions where sweat and sebum collect for long periods of time, providing a rich environment for the growth of fungi.
Ceruminous glands produce a waxy secretion known as cerumen to protect the ear canals and lubricate the eardrum. Excretion In addition to secreting sweat to cool the body, eccrine sudoriferous glands of the skin also excrete waste products out of the body. The dermal papillae increase the surface area of the dermis and contain many nerves and blood vessels that are projected toward the surface of the skin.
Nails Nails are accessory organs of the skin made of sheets of hardened keratinocytes and found on the distal ends of the fingers and toes. The reticular layer is made of dense irregular connective tissue that contains many tough collagen and stretchy elastin fibers running in all directions to provide strength and elasticity to the skin.
As the follicle produces new hair, the cells in the root push up to the surface until they exit the skin. Hemoglobin is another pigment most noticeable in people with little melanin.Integumentary System The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands.
The skin is only a few millimeters thick yet is by far the largest organ in the body. The integumentary system includes hair, scales, feathers, hooves, and nails.
It has a variety of additional functions; it may serve to waterproof, and protect the deeper tissues, excrete wastes, and regulate temperature, and is the attachment site for sensory receptors to.
Integumentary System Organs The integumentary system forms a protective barrier between the external environment and the inner tissues. Other than that, the integumentary system organs work together to provide insulation and help in excreting waste from the body.
The integumentary system is the set of organs that forms the external covering of the body and protects it from many threats such as infection, desiccation, abrasion, chemical assault and radiation damage.
Integumentary System The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands. The skin is only a few millimeters thick yet is by far the largest organ in the body.
The integumentary system is composed of the following parts: Skin. Skin appendages. Hairs. Nails. Sweat glands. Sebaceous glands.
Subcutaneous tissue and deep fascia. Mucocutaneous junctions. Breasts.
Skin. The skin is the largest component of this system.Download