Abeka Health Grade 9 Section 2.4

Homeostasis

the maintaining of a stable internal environment by the body

Skin

the largest organ of the body

Dermatology

the study of the skin—its structure, functions, disorders, and diseases

Hypodermis

subcutaneous layer; a fatty layer of loose connective tissue that attaches the skin to muscle and bone

Dermis

the complex layer of the skin

Hair follicles

small sacs of epidermal cells in the dermis

Sebaceous Gland

connected to the hair follicles

Sebum

oily secretion which moisturizes the skin and helps keep it soft and flexible

Sensory receptors

nerve endings in the dermis serve as a means of communication between your body and the outside world

Epidermis

the skins outer layer that contains no blood vessels and very few pain receptors

Facial Skin

the most delicate skin on the body

Cuticle

a layer of dead cells at the base of the nail which helps prevent disease-causing bacteria from entering the body

Plaque

a sticky, colorless film of harmful bacteria

Halitosis

bad-smelling breath due to poor oral hygiene

Malocclusion

a condition in which the teeth of the upper and lower jaws do not align properly and can affect an individuals appearance and speech

Melanin

a dark-colored pigment

Basal-cell carcinoma

and squamous-cell carcinoma; usually associated with long-term exposure to the sun’s rays