Integumentary System Quiz

The skin and its associated structures such as hair, nails, and glands.

The study of the integumentary system and its diseases.

The outer, thinner layer of skin made up of epithelial tissue.

The inner, thicker layer of skin.

The layer of fat and connective tissue beneath the dermis which attaches skin to the body.

The largest organ by surface area and weight in the body.

Approximately 2 square meters.

Approximately 4.5-5 kg.

The process by which keratinocytes accumulate keratin, a protein that provides protection. As cells move from the deepest layer of the epidermis to the surface, they undergo keratinization.

A layer in the epidermis where keratinization starts. Keratohylain granules and lamellar granules are also found in this layer.

A condition where excess keratinized cells are shed from the scalp. This is why a lot of people get dandruff.

Specialized cells found in the epidermis that produce melanin. Melanin is responsible for our skin's color as well as protecting the dermis from UV radiation.

A dark brown pigment that gives skin its color and protects the dermis from UV radiation.

The amount and type of melanin produced determine skin pigmentation. Different people have different amounts of melanin, leading to variations in skin color.

Eumelanin is a type of melanin that produces darker pigments, contributing to darker skin tones.

The outer layer of skin that protects the body from the environment. It's composed of epithelial tissue.

The study of the unique patterns of epidermal ridges on the skin, often used in personal identification.

Variations in skin color are due to different levels of melanin, carotene, and hemoglobin.

The amount of melanin produced, not the number of melanocytes, determines skin color.

A benign localized overgrowth of melanocytes, often appearing as a mole.

An inherited condition where the body lacks the ability to produce melanin.

The layer beneath the dermis, connecting the skin to underlying tissues and organs.

Sensory receptors found in the subcutaneous layer that detect external pressure applied to the skin.

Sweat glands found in virtually all areas of the skin, secreting a watery fluid that helps regulate body temperature.

Sweat glands found in the armpits and groin, secreting a thicker sweat containing fats and proteins, largely triggered by emotional stress or sexual excitement.

Modified sweat glands located in the ear canal that produce a waxy substance called cerumen (earwax) which prevents entry of foreign objects.

Hard, keratinized epidermal cells located over the dorsal surfaces of the ends of fingers and toes.

A condition where patches of skin lose their pigmentation due to the loss of melanocytes.

A yellow-orange pigment found in the stratum corneum, dermis, and subcutaneous layer, giving the skin a yellowish hue.

A red pigment found in red blood cells (erythrocytes) that circulate in dermal capillaries, responsible for the pinkish-red color of the skin.

Long, slender filaments composed of dead, keratinized epidermal cells that project above the skin surface.

The visible part of the hair that extends beyond the skin surface.

The portion of the hair that lies beneath the skin surface, embedded in the hair follicle.

A tube-like invagination of the epidermis that encloses the hair root.

The inner layer of the hair follicle, derived from the epidermis, which surrounds the hair root.

The outer layer of the hair follicle, derived from the dermis, that protects it.

Tiny, sac-like glands connected to hair follicles that secrete an oily substance called sebum, which lubricates the hair and skin.

Thick skin covers the palms, palmar surfaces of digits, and soles, while thin skin covers the rest of the body.

Blood vessels dilate, bringing more heat to the skin for radiation, convection, and conduction. Sweat glands produce sweat, which carries heat away through evaporation. Erector pili muscles contract, releasing heat from the skin.

The skin is a barrier that protects against injury, infection, and UV radiation.

The skin contains sensory receptors that detect touch, pressure, temperature, and pain.

The epidermis develops from the ectoderm, while the dermis develops from the mesoderm. Both originate from embryonic germ layers.

This fatty substance covers a fetus's epidermis, protecting it before birth.

The epidermis heals through a process of cell division and migration, guided by growth factors and cytokines. It restores the epithelial layer.

Deep wound healing involves a more complex process involving all skin layers. It includes inflammation, granulation tissue formation, and collagen deposition.

Wrinkling, decreased immune responsiveness, dehydration, decreased sweat production, and loss of subcutaneous fat are some of the effects of aging on the skin.

Melanocytes are the cells in the epidermis that produce melanin, the pigment responsible for skin color.