Human Structure Virtual Histology

    The integument or skin constitutes an organ system with a variety of important functions.

    Consisting of dermal and epidermal layers, the skin protects the body from various kinds of mechanical injury and constitutes the first line of defense against invasion of foreign organisms. With the various epidermal appendages (hair, nails, sweat glands, and sebaceous glands), skin is critical for maintaining the body's temperature and preventing desiccation.

    The skin also contains many receptors for various kinds of sensory stimuli and represents the direct site of interaction between the body and the environment. In addition, skin has various metabolic functions, such as synthesis of vitamin D by cells of epidermis.

    The protective, sensory, thermoregulatory and artistic platform functions of the integument are reflected in its complex morphology.

    The learning objectives for this module are:

    1. Identify the epidermis, dermis, and hypodermis and key features of each.
    2. Identify the layers and cells within thick and thin skin.
    3. Identify associated structures (sweat and sebaceous glands, hair follicles, and sensory receptors) within the skin.

    The morphology of thick skin.