Skin Structure and Functions - Kelly Pasicznyk

Different hair types and textures

• Various characteristics of hair.

• Only the color of hair.

• The length of hair only.

• The shape of hair follicles.

The Telogen phase is the resting phase of the hair growth cycle.

• The Anagen phase is the active growth phase of the hair cycle.

• The Catagen phase is the transitional phase of the hair growth cycle.

• The Telogen phase is the resting phase of the hair growth cycle.

• The Exogen phase is the shedding phase of the hair growth cycle.

Cuticle, cortex, and medulla

• Three layers of the hair formed by keratinized cells.

• The outermost layer of skin that protects the hair.

• A type of hair treatment that enhances shine.

• The process of hair growth from the scalp.

The Cortex

• The outermost layer of the hair shaft, providing protection.

• The middle layer of the hair shaft, providing strength and color.

• The innermost layer of the hair shaft, responsible for moisture retention.

• The layer of the hair shaft that determines the hair's texture.

What triggers the arrector pili muscle?

• High temperatures or relaxation stimuli

• Cold temperatures or emotional stimuli such as fear

• Physical exercise or excitement

• Humidity or calmness

Definition of hair follicle

• A tube-like "pocket" out of which the hair grows.

• A type of skin cell that produces pigment.

• A gland that secretes oil to keep hair moisturized.

• A structure that supports the growth of nails.

Role of the dermis in skin structure

• The dermis provides strength and elasticity to the skin and contains blood vessels, nerves, and hair follicles.

• The dermis is primarily responsible for the production of melanin in the skin.

• The dermis acts as a barrier to prevent water loss from the skin.

• The dermis is the outermost layer of the skin that protects against environmental damage.

Sebaceous glands

• Produce the natural oil of the hair and skin, called sebum

• Secrete sweat to regulate body temperature

• Help in the absorption of nutrients through the skin

• Are responsible for the production of hair follicles

Location of the papilla

• At the base of the hair follicle.

• At the tip of the hair shaft.

• In the dermis layer of the skin.

• Near the sebaceous gland.

Function of Subcutaneous Tissue

• Acts as a protective cushion for the skin.

• Regulates body temperature.

• Produces sweat and oil for skin hydration.

• Facilitates the movement of muscles.