The Integumentary System - 5.1 Questions Flashcards
What organ is composed of a superficial epithelial layer and a deeper connective tissue layer?
The skin.
What is the name of the upper layer of the skin?
Epidermis.
What is the name of the lower layer of the skin?
Dermis.
What type of tissue is the epidermis?
Stratified squamous epithelium.
What lies deep to the dermis and attaches the skin to bones and muscles underneath the skin.
The hypodermis (also called the subcutaneous).
What type of tissue is the hypodermis (subcutaneous)?
Loose connective tissue.
One of the functions of the skin is thermoregulation. What is the role of the skin in thermoregulation?
The regulation of the body’s temperature by increasing and decreasing blood flow in the skin and sweating.
The skin is the largest sense organ. What does skin have to detect heat, cold, pressure, touch and pain.
Nerve endings.
What vitamin is made in the skin?
Vitamin D that is needed for bone development.
Define Keratin:
A protein that hardens and waterproofs the epidermal skin cells.
The majority of the skin cells are called:
keratinocytes
Keratinocytes make the tough protein called:
Keratin.
Stem cells found in the stratum basale are responsible for:
Mitosis
The epidermis is avascular (lacks blood vessels).
True or False
True
The stratum basale gets its nutrients from the underlying _________________.
Dermis
What cells are found in the stratum basale?
Stem cells, melanocytes, keratinocytes and tactile cells.
What type of cell is found in the stratum corneum?
Dead, keratin – packed keratinocytes.
Name the upper layer (most superficial) layer of the epidermis.
Stratum corneum.
What is the major tissue of the dermis?
Dense (fibrous ) connective tissue.
Elastic fibers and collagen are found in what type of tissue.
Connective tissue
Hair follicles, piloerector muscles, sweat glands, sebaceous glands and small blood vessels are found in this skin layer.
The dermis
Name what is found in the dermal layer of the skin.
Hair follicles, piloerector muscles, sweat glands, sebaceous glands and small blood vessels are found in this skin layer.
What types of tissues are found in the hypodermis?
Loose connective tissue and adipose cells. Arteries and veins travel through the hypodermis to the dermis.
What is the purpose of the adipose tissue?
Adipocytes store fat that helps to insulate and pad the body.
