INTEGUMENTARY system
Arrector Pili Muscle
"Goose bump" formation of the skin. (hair stands up)
Reticular Layer:
- Makes up 80% -(Deeper Layer) Dense Firbrous Connective Tissue. - Contains Cleavage and tension lines. -Collagen fibers gives strength and reliency that prevents most jabs and scrapes.
Dermal Papillae
- Makes up only 20% -(Superficial) Aereolar Connective Tissue. -Has capillary loops, Meissner's corpuscles and free nerve endings. -Skin markings such as Dermal ridges(Friction ridges) of fingerprints.
2 Layers of the Dermis?
1) Dermal Papillae 2) Reticular Layer
Sweat glands
1) Eccrine 2) Apocrine
Appendages of the skin
1) Hair follicles 2) Sebaceous glands (oil glands/ sebum) 3) Sweat glands 4) Nails
The ________ acts as an insulator for the body?
1) Hypodermis 2) Sebaceous Tissue 3) Dermis 4) Dermis
4 distinct types of cells in the EPIDERMIS:
1) Keratinocytes 2) Melanocytes 3) Merkel Cells 4) Langerhan Cells
Skin Pigments
1) Melanin 2) Carotene 3) Hemoglobin
EPIDERMIS layers
1) Stratum Corneum (dead cells). 2) Stratum Lucidum 3) Stratum Granulosum 4) Stratum Spinosum 5) Stratum Basale Come Lets Get Sun Burned
Stratum corneum
20-30 layers of dead cells, sacs filled with keratin (most superficial)
Stratum granulosum
5 layers flattened cells, grainy, deteriorating with granules
The skin is composed of _________ layers.
A) 1 B) 3 C) 2 D) 4
Which layer is not part of the Integumentary system?
A) All are part of the Integumentary System B) Dermis C) Hypodermis D) Epidermis
Sudoriferous (sweat) glands are found everywhere expect?
A) Arms & Legs B) Feet C) Palms & Soles D) Nipples and parts of the external genitalia
What area of the skin structure is responsible for "goose bump" formation of the skin?
A) Arrector Pili Muscle B) Meissner's Corpuscle C) Sensory Nerve Fiber D) Pacinian corpuscle
layer of the epidermis expected to be healthiest cells?
A) Basale B) Lucidum C) Corneum D) Spinosum E) Granulosum
epithelial cells constantly shed from which stratum
A) Basale B)Lucidum C) Corneum D) Spinosum E) Granulosum
mitosis occurs primarily in which stratum of the epidermis
A) Basale B)Lucidum C) Corneum D) Spinosum E) Granulosum
What layer of the skin contains Keratinocytes, Melanocytes, Merkel Cells, and Langerhan Cells?
A) Dermal Papillae B) Dermis C) Epidermis D) Hypodermis
What area of the skin structure is responsible for the skin's sensitivity to light touch?
A) Dermal Papillae B) Hair Plexus C) Meissner's Corpuscle D) Pacinian Corpuscle
Which layer of the dermis account for 20% of the dermis and has finger-like pegs that lies next to the epidermis?
A) Granular Layer B) Spiny Layer C) Basal Layer D) Papillary Layer
Which of the options is not considered an appendage of the skin?
A) Nails B) Hair & Hair Follicles C) Sweat Glands D) Carotene
The sebaceous glands are found everywhere on the body except?
A) Palms & Soles B) Head C) Neck & Ears D) Back
The skin is considered an organ.
A) True B) False
The Pacinian corpuscle is a nerve ending responsible for sensitivity to pain and pressure.
A) True B) False
The Reticular Layer account for 50% of the dermis and is made up of superficial fascia.
A) True B) False
The skin is considered a tissue.
A) True B) False
The ________ is responsible for why you would feel something touch your hair.
A)Hair Follicle B) Hair Root C) Root Hair Plexus D) None of the options
Hair shaft
Allows the body to sense things (touch receptor)
Dermis
Contains nerves and nerve fibers and bloody vessels.
Lucidum/Corneum
Dead cells
Keratinocyte Cells
Epidermal cell that produces Keratin.
Langerhan Cells
Epidermal cells that command function and have self-defend function.
Merkel Cells
Epidermal touch cells...relay touch-related information such as texture and pressure to the brain.
Melanocyte Cells
Epidermal, mature melanin-forming cell
INTEGUMENTARY system
Has 2 Main layers.
Hypodermis
Last layer: -Just the fat layer, Acts as an insulator for our body to keep us warm.
Stratum Spinosum
Layers with keratinocytes, desmosomes, pre keratin in cell bundle
Stratum basale
Living layer, cell divisions, deepest, mitoic stem cells, melanocytes, dendritic cells
Epidermis
Made up of Keratinized Squamous Epithelium.
Pacinian Corpuscle
Responsible for feeling pain and pressure.
Eccrine gland
The most numerous type that is found all over the body particularly on the palms, soles of the feet, and forehead.
Meissner Corpuscles
Touch receptors located near the surface of the skin.
stratum lucidum
Translucent cells containing keratin fibrils
Apocrine gland
develop in areas abundant in hair follicles, such as your armpits and groin, and they empty into the hair follicle just before it opens onto the skin surface.
Sebaceous glands
oil glands that produce sebum.
