Ch. 5 Integumentary System Flashcards
The integumentary system is composed of the skin, hair, oil and sweat glands, and ___
Nails
The ___, the largest organ of the body, is a protective barrier that has sensory receptors, excretes excess salts, synthesizes vitamin D, and regulates body temperature.
Skin
The most numerous epithelial cells are ___ that produce the protective protein keratin.
Keratinocytes
The ___ contains blood vessels, nerves, sensory receptors, hair follicles, and glands
Dermis
Skin color is a result of the pigments melanin, ____, and hemoglobin.
Carotene
Sebaceous glands produce what?
Oil
Of the two types of sudoriferous (sweat) glands, eccrine and apocrine, which type helps regulate body temperature through evaporative cooling and which has ducts that open into hair follicles?
Eccrine / Apocrine
Does thick skin contain sudoriferous or sebaceous glands?
Sudoriferous
Epidermal layers from deep to superficial:
\_\_\_\_ \_\_\_\_ Stratum spinosum Stratum granulosum Stratum lucidum (only in thick skin) Stratum corneum
Stratum basale
Melanocytes
Spidery-black cells that produce the brown-to-black pigment melanin
The more superficial dermal region composed of areolar connective tissue
Papillary layer
The ____ layer is the deepest skin layer; it’s composed of dense irregular connective tissue and contains many arteries and veins, sweat and sebaceous glands, and pressure receptors
Reticular
The skin rests on the ___, which stores fat and has large blood vessels.
Hypodermics
Dendritic cells, also called _____ cells, play a role in immunity by performing phagocytosis
Langerhans
Tactile, or Merkel discs, are responsible for sensing what?
Light touch
