Skin - The Jack of All Trades

Damage caused by physical forces, like impacts or pressure.

Infection caused by harmful bacteria entering a plant.

The loss of water from a plant through its surface, usually leaves.

The outermost layer of the skin, composed of flattened cells that have lost their nuclei. These cells gradually shed as new cells are produced from beneath.

The middle layer of the epidermis, comprised of two or three sub-layers of flattened cells.

The innermost layer of the epidermis where new skin cells are generated. These cells divide and push outward, replacing the older cells.

A pigment that gives skin its color. Its concentration varies among different races, leading to different skin tones.

The skin's role in regulating body temperature, maintaining a comfortable internal temperature, primarily through sweating and blood vessel constriction or dilation.

The skin's ability to sense external stimuli, like touch, pressure, pain, and temperature, through specialized nerve endings in the dermis.

The skin's role in protecting the body from harmful substances and microorganisms, like bacteria and viruses, through a barrier formed by the epidermis.

The skin plays a role in the synthesis of vitamin D, which is crucial for calcium absorption and bone health. This process is triggered by sunlight exposure.

The skin's capacity to excrete waste products, such as sweat and salts. This is an important component of the body's detoxification system.

A specialized structure in the dermis that supplies blood to the hair follicle, providing nourishment and oxygen for hair growth.

The outermost layer of the hair, composed of keratin and responsible for giving hair its color and texture.

The core of the hair shaft containing pigment granules, providing hair color.

The innermost layer of the hair shaft, containing a soft, protein-rich material.

A nail is composed of three main parts: nail plate, nail bed and nail matrix.

The visible part of the nail, consisting of hardened keratin cells.

The skin under the nail plate, responsible for nail growth and circulation.

The area at the base of the nail, responsible for nail growth and formation.

The nail matrix contains specialized cells that divide and differentiate into nail cells, forming new nail tissue.

The nail's blood supply is located beneath the nail bed, providing oxygen and nutrients for nail growth and health.

A region in the brain responsible for controlling body temperature. It acts like a thermostat, sensing changes and triggering responses to maintain the ideal temperature.

Animals that rely on external sources to regulate their body temperature, like the sun or a cool shade. Their body temperature fluctuates with the environment.

The process of losing heat through the skin via multiple mechanisms like convection (air movement), conduction (direct contact), radiation (heat waves), and evaporation (sweat).

Heat is lost as warm air is exhaled from the lungs. This can be felt by breathing onto the back of your hand.

The muscle attached to hair follicles that contracts in response to cold or fear, causing hair to stand on end, creating a goosebump effect.

The oily substance secreted by sebaceous glands that helps moisturize and protect the skin.

Small, sac-like glands associated with hair follicles that produce sebum.

A condition characterized by the accumulation of sebum in pores, leading to inflammation and pimples, often in adolescents due to hormonal changes.

When an open pore becomes clogged with sebum and dead skin cells, turns black due to oxidation.

A condition that results from sebum accumulating in pores, attracting bacteria, leading to infection and boils or pimples.

The process of losing and regrowing hair continuously. Scalp hair typically lasts 2-5 years, eyebrows and eyelashes 3-5 months.

Forensics uses the subtle differences in hair from various body parts (head, chest, armpit, beard, nose) for identification and crime investigations.

Hair provides a sense of touch because nerve fibers extend to their bases.

Eyelashes prevent foreign particles from entering the eyes, and nose hairs filter out dust particles from entering the nasal passages.