6.1 & 6.2

6.1- Introduction &

6.2- Skin and Its Tissues

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Two or more types of tissues grouped together and performing specialized functions constitute an

.

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Skin and its accessory structures (hair, nails, sensory receptors, and glands) make up the

system.

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The outer layer of skin composed of stratified squamous epithelium is called the

.

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The inner layer of skin including connective tissue, epithelial tissue, smooth muscle tissue, nervous tissue, and blood is called the

.

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Beneath the dermis are masses of areolar tissue and adipose tissue that bind the skin to the underlying organs forming the

layer.

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In the epidermis the older cells (keratinocytes) harden in a process called

.

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Specialized cells in the epidermis called melanocytes produce

a pigment that provides skin color.