Biology Flashcards
Integumentary System
Protection, Covering, Metabolic Functions
Body system that forms the body’s outer covering and primarily functions in protecting the body from the threats of outside environment.
Integumentary System
What are the derivatives of the skin?
Hairs, Nails, Glands
What are the various functions of the Integumentary System?
- Sensation
- Thermoreglation
- Vitamin D synthesis
- Excretion
- Osmoregulation
Thick Skin means?
Hairless
Thin Skin means?
Hairy
Largest external organ of the body.
Skin
What are the functions of the skin?
Protection, Covering, Sensation, Thermoregulation, Vitamin D Sensation, Excretion, Osemoregualtion
What are the three main layers of the skin?
- Epidermis
- Dermis
- Hypodermis
The outermost layer of the skin.
Epidermis
What are the five main layers of the Epidermis?
- Stratum Corneum
- Stratum Licidum
- Sayrtum Granulosum
- Stratum Spinosum
- Stratum Basale
It is the uppermost multi-layer of dead keratinized,
corniced squamous cells.
Stratum Corneum
Cells of this layers are dead because there is no blood vessels found here.
Stratum Corneum
It is a protein that acts as a waterproofing substance.
Keratin
Stratum Corneum is _________ or ___________
cornified or multi-layered
This layer has keratin.
Stratum Corneum
This layer is only found in the thick skin.
Stratum Lucidum
Thick skin includes the skin found in the ______ and
_________ of the foot.
palm and sole
Provides additional thickness to these areas which are prone to shock and pressure.
Stratum Lucidum
Has active keratinocytes, which are cells producing
keratin.
Stratum Granulosim
The lowermost layer made up of one layer of columnar cells.
Stratum Basale
This layer is the mitosis layer.
Stratum Basale
The cells are actively dividing giving rise to cells which will later compromise the upper layer.
Mitosis
Tha stratum basale forms the _____ and _______.
nails and hair
This layer contains melanocytes.
Stratum Basale
This are cells that will produce melanin.
melanocytes
It is a substance responsible for skin pigmentation.
Melanin
High Melanin Production results to _______ skin color.
Low Melanin Production results to_________ skin color.
Darker and Lighter
Higher Melanin Production results to ______ skin color Lower Melanin Production results to ______ skin color.
Darker and Lighter
It is a type of melanin which is more photoprotective than pheomelanin.
Eumelanin
It is present in higher quantities in dark skin and dark eyes than in lighter skin and eyes.
Pheomelanin
When the skin is exposed to UV rays from the sunlight, the epidermis synthesizes a form of Vitamin D called ______.
Cholecalciferol
