Question

directions: read the definitions, and then label the skin anatomy diagram below.
blood vessels - tubes that carry blood as it circulates. arteries bring oxygenated blood from the heart and lungs; veins return oxygen - depleted blood back to the heart and lungs.
dermis - (also called the cutis) the layer of the skin just beneath the epidermis.
epidermis - the outer layer of the skin.
hair follicle - a tube - shaped sheath that surrounds the part of the hair that is under the skin. it is located in the epidermis and the dermis. the hair is nourished by the follicle at its base (this is also where the hair grows).
hair shaft - the part of the hair that is above the skin.
hair erector muscle - a muscle is connected to each hair follicle and the skin - it contracts (in response to cold, fear, etc.), resulting in an erect hair and a \goose bump.\
melanocyte - a cell in the epidermis that produces melanin (a dark - colored pigment that protects the skin from sunlight).
pacinian corpuscle - nerve receptors that respond to pressure and vibration; they are oval capsules of sensory nerve fibers located in the subcutaneous fatty tissue
sebaceous gland - a small, sack - shaped gland that releases oily (fatty) liquids onto the hair follicle (the oil lubricated and softens the skin). these glands are located in the dermis, usually next to hair follicles.
sweat gland - (also called sudoriferous gland) a tube - shaped gland that produces perspiration (sweat). the gland is located in the epidermis; it releases sweat onto the skin.
subcutaneous tissue - fatty tissue located under the dermis.

Explanation:

• Blood vessels: Look for tube - like structures in the dermis (as blood vessels are in the dermis layer) that could represent arteries (carrying oxygenated blood) or veins (carrying oxygen - depleted blood).
• Dermis: The layer just beneath the epidermis. It is thicker and has structures like hair follicles, sebaceous glands, etc., embedded in it.
• Epidermis: The outermost layer of the skin.
• Hair follicle: A tube - shaped structure that surrounds the part of the hair under the skin (in the epidermis and dermis).
• Hair shaft: The part of the hair above the skin.
• Hair erector muscle: A small muscle attached to a hair follicle and the skin.
• Melanocyte: Since it is in the epidermis, look for cells (represented in a simplified way in the diagram) in the epidermis layer.
• Pacinian corpuscle: Oval capsules of sensory nerve fibers in the subcutaneous fatty tissue.
• Sebaceous gland: A small, sack - shaped gland near a hair follicle in the dermis.
• Sweat gland: A tube - shaped gland (in the epidermis in the definition, but in real anatomy, sweat glands have parts in the dermis and epidermis; based on the definition given, look for a structure that releases sweat onto the skin).
• Subcutaneous tissue: The fatty tissue layer under the dermis.

Answer:

• For each label, match the structure in the diagram to its definition. For example:
• The outermost thin layer is the Epidermis.
• The thicker layer beneath it is the Dermis.
• The tube - like structure surrounding the hair under the skin is the Hair follicle.
• The part of the hair above the skin is the Hair shaft.
• The small muscle attached to the hair follicle is the Hair erector muscle.
• The tube - like structures in the dermis are Blood vessels.
• The oval structures in the subcutaneous tissue are Pacinian corpuscles.
• The small sack - shaped glands near hair follicles in the dermis are Sebaceous glands.
• The tube - shaped gland (even if diagrammatic) that releases sweat (could be represented as a coiled or tube structure) is the Sweat gland.
• The fatty tissue layer at the bottom is the Subcutaneous tissue. And for Melanocyte, if there are cells represented in the epidermis (though in a simple diagram, it might be a bit hard, but based on the layer - epidermis, it should be placed there).