Lab 1: skin Flashcards
(25 cards)
What is the main function of the skin? - 6
- Covers the entire outer surface of the body
- barrier against microorganisms
- protection from damage
- thermoregulation
- water balance
- sensory organ
What are the three main layers of the skin?
Epidermis, Dermis, Hypodermis
What type of epithelium makes up the epidermis?
Keratinized stratified squamous epithelium
What is the outer layer of the epidermis called?
Stratum corneum:
* keratin-rich
* protective
* water resistant
What is the primary composition of the dermis?
Irregular dense connective tissue
What are the two sub-layers of the dermis?
- Papillary stratus - thin, superficial
- Reticular stratus - thicker, deeper
True or False: The dermis is highly vascularized ( process of growing blood vessels into a tissue to improve oxygen and nutrient supply)
True
What connects hair follicles to the dermis?
- Erector hair muscle (smooth muscle)
- sebaceous glands
What type of glands are sebaceous glands?
Simple branched acinar glands
What do sweat glands secrete?
Sweat
Fill in the blank: The hypodermis is made of _______.
Loose connective tissue
What is the primary function of cutaneous appendages?
To assist in various skin functions including protection and thermoregulation
What type of cells are found in the secretory part of sweat glands?
Cuboidal or cylindrical
How does the dermis interdigitate with the epidermis?
Via evaginations/invaginations
What is the primary function of the stratum corneum?
To provide a keratin-rich, protective, water-resistant barrier
What is the characteristic structure of hair follicles?
Tubular invagination of epidermis extending into dermis
What is the role of adipose tissue in the hypodermis?
Provides insulation and energy storage
what is this
sebacous gland
