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H.A. 3
Integumentary System
| Question | Answer |
|---|---|
| What is the largest organ in the body? | Skin |
| What are the two layers of the skin? | Epidermis and dermis |
| Epidermis | out layer that is composed of stratified squamous epithelium |
| Dermis | Inner layer that is thicker than the epidermis |
| What separates the two layers of the skin? | a basement membrane |
| What is the layer below the dermis that contains loose connective tissue and adipose tissue? | Subcutaneous Layer |
| What does the subcutaneous layer do? | binds the skin to underlying organs. |
| What are the characteristics of skin? | protective covering, prevents water loss, houses sensory receptors, synthesizes chemicals, excretes some waste, and helps regulate body temperature. |
| Which layer of the skin lacks blood vessels? | Epidermis |
| Which layer of the epidermis lies closest to the dermis with cells that are nourished by blood vessels. | Stratum basale |
| Where do the cells in the stratum basale go when they grow and divide? | Skin surface |
| What do the cells of the epidermis do when they die and what layer do they form? | Filled with keratin and form the stratum corneum. |
| What specialized cells in the epidermis produce the pigment melanin? | Melanocytes |
| Why are some people darker than others? | The melanocytes in their skin produce more melanin |
| What layer of the skin is composed largely of dense connective tissue mainly collagenous and elastic fibers? | Dermis |
| What does the dermis bind to underlying tissue? | Epidermis |
| What kind of fibers are scattered throughout the dermis? | Nerve fibers |
| The dermis contains hair follicles and what two glands? | Sebaceous and sweat glands. |
| The subcutaneous layer is also called the? | Hypodermis |
| This layer contains what? | Major blood vessels |
| On what skin surfaces is hair not present? | Palms, soles, nipples ,and external reproductive parts. |
| Hair follicle | A group of epidermal cells that from at the base of a tube-like depression |
| Sebaceous glands are what kind of gland? | Exocrine |
| What does a sebaceous gland secrete? | sebum |
| What does sebum do to the hair? | keeps it soft, pliable, and waterproof. |
| What kinds of tissue are nails made of? | Keratinized stratified squamous epithilial. |
| What is the name of the half white moon-shaped area at the based of the nail? | Lanula |
| What is the lanula? | The most active growing region |
| What is the most numerous sweat gland in the skin? | Eccrine gland |
| What do the Eccrine glands respond to? | Body temperature |
| What is sweat secreted into? | Pore |
| What sweat glands are activiated by emtional upset or fear? | Aprocrine Glands |
| What gland secrete ear wax? | Ceruminous Glands |
Created by:
whysayname
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