Seeleys Anatomy and Physiology
Chapter 5 Integumentary System
Resists abrasion on the skins surface and reduces water loss through skin. Does NOT
contain blood vessels. - ✔️✔️Epidermis
Dermis - ✔️✔️Responsible for most of the structural strength of the skin. (Connective
tissue)
Subcutaneous tissue or hypodermis - ✔️✔️A layer of looks connective tissue
integumentary system - ✔️✔️Consists of the skin, mucous membranes, hair, and nail
5 Major functions of the skin - ✔️✔️1. Protection
2. Sensation
3. Temperature
4. Vitamin D
5. Excretion
2 major tissue layers of skin - ✔️✔️Epidermis and dermis
Superficial layer of the skin, consisting of epithelial tissue - ✔️✔️Epidermis
Subcutaneous layer or hypodermis - ✔️✔️Not part of the skin or the integumentary
system but it does connect the skin to underlying muscle or bone.
Type of epithelium the epidermis is: - ✔️✔️Stratified squamous
Keratinocytes - ✔️✔️Most cells of the epidermis
Keratinocytes - ✔️✔️produce keratin
Keratin - ✔️✔️hard protein material found in the epidermis, hair, and nails
Melanocytes - ✔️✔️Cells of the epidermis that contribute to skin color
Langerhans cells - ✔️✔️Part of the immune system
Merkel cells - ✔️✔️associated with sensory neurons and functions in sensation of
touch.
, Keratinazation - ✔️✔️Where the cells accumulate keratin
Psoriasis - ✔️✔️Chronic skin condition that has dry, reddish patches with silvery scales
Strata - ✔️✔️Layers or regions
5 Strata from deepest to most superficial: - ✔️✔️1. Stratum Basale
2. Stratum Spinosum
3. Stratum Granulosum
4. Stratum Lucidum
5. Stratum Corneum
Stratum Basale - ✔️✔️the deepest layer of the epidermis
stratum spinosum - ✔️✔️a layer of the epidermis that provides strength and flexibility to
the skin. Consisting 8-10 layers
stratum granulosum - ✔️✔️3rd layer of the epidermis. Consists of 2-5 layers
Keratohyalin - ✔️✔️granulated protein found in the stratum granulosum
Stratum lucidum - ✔️✔️Clear, transparent layer of the epidermis under the stratum
corneum, only on thick skin.
stratum corneum - ✔️✔️The tough outer layer of the epidermis; cells are filled with
keratin. Consists of cornified cells
Keratin - ✔️✔️Mixture of keratin fibers and keratohyalin
Cornified cells - ✔️✔️Dead cells with a hard protein envelope filled with the protein
keratin.
Thick skin - ✔️✔️Has all 5 epithelial strata, and the stratum corneum has many layers
of cells. Located in areas subject to pressure or friction like the soles of your feet.
Thin skin - ✔️✔️Covers the rest of the body. More flexible than thick skin. It's strata
contains fewer layers of cells than in thick skin.
Hair is found only in what type of skin: - ✔️✔️Thin skin
Callus - ✔️✔️area of thick hard skin due to friction or pressure. Can be developed in
both thick and thin skin.
Chapter 5 Integumentary System
Resists abrasion on the skins surface and reduces water loss through skin. Does NOT
contain blood vessels. - ✔️✔️Epidermis
Dermis - ✔️✔️Responsible for most of the structural strength of the skin. (Connective
tissue)
Subcutaneous tissue or hypodermis - ✔️✔️A layer of looks connective tissue
integumentary system - ✔️✔️Consists of the skin, mucous membranes, hair, and nail
5 Major functions of the skin - ✔️✔️1. Protection
2. Sensation
3. Temperature
4. Vitamin D
5. Excretion
2 major tissue layers of skin - ✔️✔️Epidermis and dermis
Superficial layer of the skin, consisting of epithelial tissue - ✔️✔️Epidermis
Subcutaneous layer or hypodermis - ✔️✔️Not part of the skin or the integumentary
system but it does connect the skin to underlying muscle or bone.
Type of epithelium the epidermis is: - ✔️✔️Stratified squamous
Keratinocytes - ✔️✔️Most cells of the epidermis
Keratinocytes - ✔️✔️produce keratin
Keratin - ✔️✔️hard protein material found in the epidermis, hair, and nails
Melanocytes - ✔️✔️Cells of the epidermis that contribute to skin color
Langerhans cells - ✔️✔️Part of the immune system
Merkel cells - ✔️✔️associated with sensory neurons and functions in sensation of
touch.
, Keratinazation - ✔️✔️Where the cells accumulate keratin
Psoriasis - ✔️✔️Chronic skin condition that has dry, reddish patches with silvery scales
Strata - ✔️✔️Layers or regions
5 Strata from deepest to most superficial: - ✔️✔️1. Stratum Basale
2. Stratum Spinosum
3. Stratum Granulosum
4. Stratum Lucidum
5. Stratum Corneum
Stratum Basale - ✔️✔️the deepest layer of the epidermis
stratum spinosum - ✔️✔️a layer of the epidermis that provides strength and flexibility to
the skin. Consisting 8-10 layers
stratum granulosum - ✔️✔️3rd layer of the epidermis. Consists of 2-5 layers
Keratohyalin - ✔️✔️granulated protein found in the stratum granulosum
Stratum lucidum - ✔️✔️Clear, transparent layer of the epidermis under the stratum
corneum, only on thick skin.
stratum corneum - ✔️✔️The tough outer layer of the epidermis; cells are filled with
keratin. Consists of cornified cells
Keratin - ✔️✔️Mixture of keratin fibers and keratohyalin
Cornified cells - ✔️✔️Dead cells with a hard protein envelope filled with the protein
keratin.
Thick skin - ✔️✔️Has all 5 epithelial strata, and the stratum corneum has many layers
of cells. Located in areas subject to pressure or friction like the soles of your feet.
Thin skin - ✔️✔️Covers the rest of the body. More flexible than thick skin. It's strata
contains fewer layers of cells than in thick skin.
Hair is found only in what type of skin: - ✔️✔️Thin skin
Callus - ✔️✔️area of thick hard skin due to friction or pressure. Can be developed in
both thick and thin skin.
