What type of tissue is the uppermost layer of the skin?
The dermis or corium is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain. It is divided into two layers, the superficial area adjacent to the epidermis called the papillary region and a deep thicker area known as the reticular dermis. The dermis is tightly connected to the epidermis through a basement membrane. Structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix. It also contains mechanoreceptors that provide the sense of touch and thermoreceptors that provide the sense of heat. In addition, hair follicles, sweat glands, sebaceous glands (oil glands), apocrine glands, lymphatic vessels, nerves and blood vessels are present in the dermis. Those blood vessels provide nourishment and waste removal for both dermal and epidermal cells. 
What tissue is the uppermost layer of the skin?
epidermis
Dermis
No context provided
What type of cells make up the uppermost layer of skin?
flattened cells that overlie a base layer composed of columnar cells
Epidermis
https://en.wikipedia.org/wiki/Epidermis
Dermis
https://en.wikipedia.org/wiki/Dermis
The epidermis layer provides a barrier to infection from environmental pathogens[2] and regulates the amount of water released from the body into the atmosphere through transepidermal water loss.
Epidermis
The uppermost layer of the skin is called the epidermis, which is made up of flattened cells that overlie a base layer composed of columnar cells. The epidermis layer provides a barrier to infection from environmental pathogens and regulates the amount of water released from the body into the atmosphere through transepidermal water loss.