Label The Structures Of The Integument

Label The Structures Of The Integument. MI / Un AL 2. Label The Structures Of Integument In The Epidermis. 2- Men 3. Label The Structures Of Integument In A Hair Follicle. 9 4. Label The Structures Integument In The Anatomy Of A Nail. 124

2- men 3. Label the structures of integument in a hair follicle. 9 4. Label the structures integument in the anatomy of a nail. 124

The correct answer and explanation is:

Correct Answers for the Labels

1. Label the Structures of the Integument (General Overview):

Epidermis: Outermost layer of the skin.
Dermis: Middle layer of the skin containing connective tissues, blood vessels, and nerves.
Hypodermis (Subcutaneous Layer): Fatty layer below the dermis providing insulation and cushioning.
Sweat Gland: Coiled structure in the dermis responsible for thermoregulation.
Sebaceous Gland: Produces sebum to lubricate the skin and hair.
Hair Follicle: A structure housing the hair root.
Blood Vessels: Provide nutrients and oxygen to the dermis and epidermis.
Nerves: Responsible for sensations such as touch, pain, and temperature.
Arrector Pili Muscle: Small muscle attached to hair follicles, causing “goosebumps.”

2. Label the Structures of the Epidermis:

Stratum Corneum: Outermost, keratinized layer of dead cells providing protection.
Stratum Lucidum: Clear layer found only in thick skin (palms and soles).
Stratum Granulosum: Contains keratohyalin granules that contribute to waterproofing.
Stratum Spinosum: Layer with keratinocytes connected by desmosomes.
Stratum Basale: Basal layer with stem cells for regeneration and melanocytes producing pigment.

3. Label the Structures of a Hair Follicle:

Hair Shaft: Visible part of the hair above the skin.
Hair Root: Portion of the hair below the skin, embedded in the follicle.
Hair Bulb: Enlarged base of the follicle, containing the matrix for hair growth.
Sebaceous Gland: Produces oil to lubricate the hair.
Outer Root Sheath: External covering of the hair follicle.
Inner Root Sheath: Internal lining surrounding the hair root.
Hair Papilla: Contains blood vessels and nerves that nourish the hair matrix.

4. Label the Structures of a Nail:

Nail Plate: The hard, visible part of the nail.
Nail Bed: Skin beneath the nail plate, rich in capillaries.
Lunula: Crescent-shaped white area at the nail base.
Cuticle (Eponychium): Protects the area between the skin and the nail plate.
Nail Matrix: Site of nail growth.
Free Edge: Extends beyond the fingertip.
Hyponychium: Skin beneath the free edge.

Explanations

The integumentary system consists of the skin, hair, nails, glands, and associated structures that protect the body from external damage and environmental changes. The epidermis is the outermost layer, made up of keratinized stratified squamous epithelium, and acts as a barrier against pathogens, water loss, and UV radiation. It has five sublayers, with the stratum basale responsible for cell division and the stratum corneum providing the outermost protection.

The dermis lies beneath the epidermis and contains connective tissues, blood vessels, nerve endings, and glands. Sweat glands, divided into eccrine and apocrine, regulate body temperature and excrete waste, while sebaceous glands secrete sebum to keep the skin and hair moisturized. The hypodermis acts as an insulator, shock absorber, and energy reservoir due to its adipose tissue.

The hair follicle is a complex structure embedded in the dermis and responsible for hair growth. The hair matrix within the follicle continuously produces new cells that form the hair shaft. The sebaceous gland and arrector pili muscle are associated with the follicle, the latter causing hair to stand upright during thermoregulation or emotional responses.

Nails grow from the nail matrix, a highly proliferative tissue at the base of the nail. The nail plate protects the fingertips and enhances grip, while the lunula and cuticle serve protective functions. Overall, the integumentary system ensures physical protection, sensory input, thermoregulation, and hydration maintenance for the body.