Chapter 3 - Workbook Flashcards
Describe what happens to someone who has third-degree burns.
There is damage to all skin layers and often damages underlying tissue. Must seek emergency medical attention.
What can cause skin cancer?
Exposure to ultraviolet rays
What are the fingerlike projections that project into the epidermis called?
Dermal papillae
What is the white crescent base of a nail called?
Lunula
An inherited condition in which cells do not produce melanin is what?
Albinism
What gives colour to hair and skin?
Melanin
What is the outer layer of the epidermis called?
Stratum corneum
New epidermal cells are pushed upward through what?
Stratum basale
What is the outer layer of skin consisting of stratified epithelial tissue called?
Epidermis
What is the purpose of sebum?
To lubricate the hair and skin
Describe what happens to someone who has first-degree burns.
There is damage to the epidermis, causing redness, swelling, and pain.
Where is hair not found on the body?
The soles of the feet, the palms, and the lips.
What is the layer of epithelium below the nail?
The nail bed
The dermis is composed mainly of what?
Collagen fibres
What is the visible part of the nail called?
The nail body
What is generally attached to hair follicles by tiny ducts?
Sebaceous glands
What part of the hair is above the skin surface?
The shaft
What is the tough waterproofing protein made up of epidermal cells called?
Keratin
Which layer consists of loose connective tissue and adipose tissue?
Subcutaneous
When skin is exposed to excessive ultraviolet radiation, melanin does what?
Increases
Where do epidermal cells die as they are pushed through?
Stratum corneum
What consists of cells that are constantly dividing by mitosis?
Stratum basale
What is the thick layer of skin beneath the epidermis called?
Dermis
What are the roots of hair made out of?
Hair follicle
What type of cancer is becoming increasingly common due to the exposure to the sun?
Malignant melanoma
Describe what happens to someone who has second-degree burns.
There is damage to the epidermis and the dermis. This causes blisters to form.
What is a hair follicle made up of?
the root with epithelial and connective tissue coverings
What is a closely compressed protein in the nail?
Keratin
What oily substance is secreted by sebaceous glands?
Sebum
What part of the hair is below the skin surface?
Root
What are pigment cells of the skin called?
Melanocytes
What do melanocytes produce?
Melanin
Blood vessels, nerves, hair follicles, and glands are located in what?
The dermis
What is the protective screen against ultraviolet rays of the sun?
Melanin
What is the actively growing part of the nail?
Stratum basale
What is the subcutaneous layer beneath the dermis?
Superficial fascia
What is the deepest layer of the epidermis called?
Stratum basale
Where are sebaceous glands numerous on?
The face and the scalp
What is the integumentary system?
The organ system made up of skin, hair, nails, and glands
What is a yellow pigment found in carrots, that also helps determine skin colour?
Carotene
The nail bed is rich in something, which gives the nail its pink colour. What is the something?
Capillaries
Where are melanocytes found?
Scattered through the lowest layer of the epidermis
