Exam One Ch. Three

Integumentary Functions

Integumentary Functions

Protection, synthesis, sensation, thermoregulation, social

Keratinized cells

make skin resistant to injuries, protection barrierSkin

Epidermis Layers from superficial to deep

Corneum, lucidum, granulosum, spinosum, basale

Stratum corneum

dead, keratinized cells

Stratum lucidum

Filled with precursor to keratin

Stratum granulosum

granules of waterproofing substance, materials to make keratin. Cells undergo apoptosis.

Stratum spinosum

Desmosomes hold cells together

Stratum basale

Stem cells that produce keratinocytes, Merkle cells, melanocytes. Attached to basement membrane

Dermis Layers superficial to deep

Papillary, reticular

Is a layer of areolar connective tissue. Contains thin collagen fibers, leukocytes, capillaries, dermal papillae.

Papillary

Made of dense irregular connective tissue and pocket of adipose tissue.

Reticular

surface sensory receptors

Meissner’s corpuscle

Deep sensory receptors

Pacinian corpuscle

Shots are injected into

Hypodermis

Cell shapes of the epithelial

columnar or cuboidal in stratum basale, become more flattened moving towards surface.

How many layers of epithelium divide?

3-5

Hair follicle is attached to this that makes it stand upright

Arrector pili (smooth) muscle

Glands in hair follicle

Apocrine and sebaceous

Types of cutaneous glands

Merocrine, apocrine, sebaceous, ceruminous, mammary

Regular sweat glands all over, secretes water to cool body, opens to outside

Merocrine (Eccrine)

Cutaneous glands are found in what layer?

Reticular

Public hair, flow into hair follicles, produce pheromones, coiled gland

Apocrine

Produce sebum, flask shaped, open to hair follicle, prevents skin drying out, holocrine

Sebaceous

Opens directly to surface, found in outer ear canal, secretes Cerumen

Ceruminous

Cancer Types:

Malignant melanoma, Basal cell carcinoma, squamous cell carcinoma.

ABCDEs of Nevi

Asymmetry, Border irregularity, color, diameter, evolution

Types of wound repair

Regeneration, fibrosis repair

Involves replacement of damaged cells with same type of cells

Regeneration

Forms clot/scab, replaces damaged tissue with scar tissue

Fibrosis/repair

After a cut, blood vessels release

leukocytes, antibodies, clotting factors, protein (fibrin)

Repair sequence

Blood vessels grow and repair, macrophages enter and remove damage and clot blood, fibroblasts synthesize new collagen to repair connective tissue, new collagen laid down by fibroblasts.

Epithelial cells proliferate and hep repair

Remodeling

Garbrect’s kids name

Zander

Endocrine glands release secretions into

the bloodstream

What is the mode of secretion of sebaceous glands?

Holocrine

Fingerprints are called

friction ridges

Which of the following is an epidermal cell with an immunological function?

dendritic cell