4.7
Hour(s)
Free
The integumentary system, our skin, is the body’s largest organ and its first line of defense against bacteria, injury, and sunlight. Our skin has three layers that include the epidermis or outermost layer, the dermis, which is right under the epidermis, and the hypodermis which lies beneath the dermis and is also known as the subcutaneous layer. Each layer has many essential functions. In this module you will:
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