Module 5-Integumentary Systems Flashcards
What does the epidermis consists of?
it consists of stratified epithetial tissue
Where is the epidermis found?
it is the outer layer of the skin
Does the epidermis has blood vessels?
no. It has a rich blood supply and nerve
Where does the epidermis get oxygen and nutrients?
it gets oxygen and nutrients by diffusion from the dermis
Where is the dermis layer found, and what is it composed of?
The dermis is the inner deeper layer and it is composed of connective tissue It contains collagen fibres which strengthen the tissues and it contains the elastin fibres and rectangular fibres.
Where is the hypodermis (subcutaneous) layer found, and what is it composed of?
Hyperdermis is the fat layer under the skin or the subcutaneous tissue. It is made up of loose connective tissue. Hypodermis that mostly composed mostly of adipose tissue is called subcutaneous fat.
Where is the stratum basale layer found, and what is its role?
The stratum basale is the inner layer of the skin. It consists of columnar stem cells and these make new skin cells.
What occurs as new skin cells push the older skin cells upward?
As new cells are pushed upward, they produce keratin which is a tough, fibrous protein
What is left of the cells by the time they reach the stratum corneum (outermost layer)?
By the time the cells reach the outermost layer which is the statum corneum, all thats left of the dead cells is their keratin. The flat cells called keratinocytes replace the dead cell that flake away with daily wear
What is the stratum corneum composed of?
Strateum corneum consists of up to 30 layers if dead, flat, keratin coated cells.
What is the function of the stratum corneum?
Strateum corneum function where dead skin cells are getting rid of. It is a protective layer that stops water from getting into your body from the outside, but it still lets it moisture from your body evaporate outwards. It keeps us dry but allows our skin to breathe
What cells produce melanin. What is the role of melanin?
The cells that produce melanin are melanocytes. Melanin determines our skin color and it protects us from uv. Uv exposure means the sun and being there too much can cause sunburn
What are the Functions of the Skin?
The functions of the skin is protection, barrier, vitamin D production, sensation and thermoregulation
What is a hair follicle
Hair follicle is those little holes in our scalp and it is where our hair grows from. It hold the hair root and helps it grow. Hair follicle has a rich nerve and blood supply.
What are nails composed of?
Nails are made from denley packed and keratinzed epithelial cells
Where are eccrine glands found?
The eccrine glands are found in the dermis.
What do eccrine glands produce, and why?
The eccrine glands produce sweat which contains potassium, ammonia, lactic acid, uric acid, and other wastes. The whole purpose of sweat is to cool down our body when we are too hot
What are Apocrine glands? What do they produce and why?
Apocrine glands are found in hair follicles such as the armpits and groin area. They are scent glands. Once we sweat due to stress that is the apocrine glands. It release its product to the hair follicles it also produces body odor.
What are sebaceous glands? What is the role of sebum?
Sebecuous glands- secrete an oily substance called sebum and this helps the skin and hair from drying out and becoming brittle and t helps the skin to be moisturized as well.
The type of gland that is found in the ear carnal and produces ear wax
Ceruminous glands
Does the epithelial tissue have a blood supply?
no
Which glands secrete sweat onto the skin’s surface?
Eccrine Glands
