Hair
True or False: Human body hair protects skin, regulates temperature, and enhances sensory perception.
True
This is the hard, visible portion of the nail that you can paint different colors and you need to cut down.
Nail Body
True
Specialized, modified sweat glands present in all mammals. Their primary evolutionary purpose is lactation—the production and secretion of milk to nourish the newborn baby.
Mammary Glands
________ is the biological process where living skin cells fill with a tough, protective protein called keratin and eventually die to form a strong outer protective layer.
Keratinization
Name the three primary types of hair that each serve a distinct biological purpose, ranging from sensory perception and temperature regulation to physical protection.
1.Vellus Hair
2.Terminal Hair
3.Lanugo Hair
This is known as the Cuticle a thin layer of tissue.
Eponychium
________is the deepest layer of your skin, located just below the epidermis and dermis
Hypodermis
These glands are found across most of the body, these simple coiled glands secrete water-based sweat directly onto the skin surface primarily for thermoregulation.
Eccrine Sweat Glands
True or False: Hair grows from follicles located in the dermis layer of the skin. It is found almost everywhere on the body, including the palms of the hands, soles of the feet, and lips.
False: Hair does not grow on the palms of the hands, soles of the feet, and lips.
This type of hair is longer, coarser, thicker, and highly pigmented. Found in the scalp, eyebrows, eyelashes, underarms, and pubic region. In many individuals (especially males), it also grows on the face, chest, abdomen, and legs.
Terminal Hair
The visible / half moon white part at the base of the nail.
Lunula
Stratum lucidum a thin, clear, and translucent layer of flat, dead cells. It is only found in "thick skin," which is found _______?
The palms of your hands and the soles of your feet.
These glands located mostly in the axillae and groin, these glands empty into hair follicles. They become active during puberty and secrete a thicker fluid that is often broken down by bacteria, resulting in body odor.
Apocrine Sweat Glands:
This is a short transitional phase where growth stops and the hair root detaches
Catagen Phase
This is fine, short, unpigmented, and generally soft.
Vellus Hair (Peach Fuzz)
Nails are hardened, modified epidermis layers composed of the protein ______.
Keratin
This is a disease that causes yellowing of the skin, the whites of the eyes, and mucous membranes. It occurs when a waste product called bilirubin builds up in the blood.
Jaundice
These exocrine glands are attached to hair follicles and are found everywhere on the skin except the palms and soles. They secrete sebum, a lipid-rich substance that waterproofs and lubricates the skin and hair.
Sebaceous Glands
This is the active growth phase where new cells multiply at the base of the root. Depending on the body part, this phase can last a few weeks (for eyelashes) to several years (for scalp hair).
Anagen Phase
The pigmentation process of hair relies on two primary types of melanin. ______responsible for dark colors. High concentrations create black and brown hair. _________responsible for lighter colors. Abundant production leads to red and orange tones.
Eumelanin | Pheomelanin
Name one of the main functions of nails within the human body
Protect the sensitive tips of our fingers and toes
Aid in sensory perception.
Provide precision functionality for everyday tasks like grasping or scratching
Skin color is largely determined by the interaction of multiple pigments. ______is the main pigment and two secondary pigments _______ and _______.
Melanin
Carotene | Hemoglobin
Specialized exocrine glands located in the ear canal that produce earwax to protect against foreign particles and drying
Ceruminous Glands
________grow much faster than _______about 3 to 4 mm per month compared to 1 mm per month
Fingernails | Toenails