BIO 141 Lab 3 Integumentary Skin Model Vocabulary

Comprehensive vocabulary flashcards based on the BIO 141 Lab 3 Integumentary skin model, defining all labeled layers, glands, hair structures, blood vessels, and sensory receptors.

Integumentary Skin Model

An anatomical model illustrating the structural layers, glands, hair components, and sensory receptors of human skin.

Epidermis

The outermost major layer of skin composed of five sub-layers or strata.

Dermis

The thick middle layer of skin situated between the superficial epidermis and deep hypodermis.

Hypodermis

The deepest layer of the skin model, located beneath the dermis and containing adipose tissue.

Stratum corneum

The most superficial layer of the epidermis.

Stratum lucidum

The thin epidermal layer situated directly beneath the stratum corneum.

Stratum granulosum

The epidermal layer positioned between the stratum lucidum and stratum spinosum.

Stratum spinosum

The epidermal layer positioned between the stratum granulosum and stratum basale.

Stratum basale

The deepest basal layer of the epidermis resting upon the dermis.

Meissner's corpuscle

(A. -bottom image)

A sensory receptor located in the upper dermis that detects light touch.

Free nerve ending

A sensory nerve ending in the skin responsible for detecting temperature and pain.

Pacinian corpuscle

A deep sensory receptor in the skin model identified as a pressure receptor.

Eccrine sweat glands

Coiled tubular glands in the dermis that produce sweat and connect to the skin surface via a duct.

Sweat gland duct

The channel through which sweat travels from an eccrine sweat gland to a sweat gland pore.

Sweat gland pore

The external opening of a sweat gland duct on the epidermal surface.

Apocrine sweat gland

A specialized sweat gland in the skin model depicted as opening into a hair follicle.

Sebaceous gland

An oil-secreting gland connected to a hair follicle in the dermal layer.

Hair follicle

The tubular sheath structure surrounding the root of a hair.

Hair shaft

The visible portion of the hair extending outward above the epidermis.

Hair bulb

The enlarged base of the hair follicle at the bottom of the hair root.

Hair papilla

A peg-like projection of dermal tissue enclosed within the base of the hair bulb.

External root sheath

The outer epithelial layer lining the hair follicle.

Internal root sheath

The inner epithelial layer surrounding the hair shaft within the follicle.

Cuticle layer

The outermost protective layer of the hair shaft structure.

Cortex

The intermediate structural layer of the hair shaft surrounding the central medulla.

Medulla

The innermost central core of the hair shaft structure.

Arrector pili muscle

A bundle of smooth muscle fibers attached to the hair follicle in the dermis.

Dermal papilla

A finger-like projection of the papillary dermis extending into the epidermis.

Capillary loop

A loop of microvascular blood vessels located inside a dermal papilla.

Adipose tissue

Fatty tissue present in the hypodermis layer of the skin model.

Vein

A vascular structure carrying blood within the dermis and hypodermis.

Artery

An arterial blood vessel structure located in the dermis and hypodermis.

Nerve

A neural fiber structure branching throughout the skin layers.