Lab 7

Keratinocytes

an epidermal cell that produces keratin.

The superficial region of the skin is the ______ composed of____________ tissue

epidermis, underlying connective

the deeper region tissue is the _________ composed of connective tissue

hypodermis

The most numerous cell of the epidermis is the

keratinocytes

dermal layer responsible for fingerprints

papillary dermis

Two primary layers of the epidermis are the ________ dermis composed of areolar connective tissue and _______ dermis composed of dense re3gular connective tissue

papillary, reticular

deep layer of dermis

reticular dermis

Epidermal layer exhibiting the most rapid cell division location of melanocytes and tactile epithelial cells

stratum basil

Layer including scalelike dead cells full of keratin that constantly slough off

stratum corneum

layer named for the numerous granules present layer that secretes a glycolipid that prevents water loss from the skin

stratum granulosum

layer of translucent cells in thick skin containing dead keratinocytes two layers containing dead cells

stratum lucidum

area where weblike per-keratin filaments first appear

stratum spinosum

4 protective functions of the skin

1. protects from infection 2. reduces water loss 3.regulates body temp 4. protects from UV rays