Dermis

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Dermis

epithelium

Epithelium

In biology and medicine, epithelium is a Biological tissue composed of cell s that line the cavities and surfaces of structures throughout the body....
and the underlying connective tissue. Zone B, indicating the region of overlapping projections of epithelium and connective tissue, is the papillary dermis

Papillary dermis

The papillary dermis is the uppermost layer of the dermis, intertwined with the rete ridges of the epidermis, composed of fine and loosely arranged collagen fibers....
. Zone C, indicating the region of dermis that lies immediately subjacent to the interdigitations of epithelium, is the reticular dermis

Reticular dermis

The reticular dermis is the lower layer of the dermis, composed of thick, densely packed collagen fibers, and the primary location of dermal elastic fibers....
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epithelium

Epithelium

Papillary dermis

Reticular dermis

The reticular dermis is the lower layer of the dermis, composed of thick, densely packed collagen fibers, and the primary location of dermal elastic fibers....
.]] The dermis is a layer of skin

Skin

The skin is the outer covering of the body, also known as the epidermis. It is the largest organ of the integumentary system made up of multiple layers of epithelial biological tissue, and guards the underlying muscles, bones, ligaments and organ s....
between the epidermis

Epidermis (skin)

The epidermis is the outermost layer of the skin, composed of terminally differentiated stratified squamous epithelium, acting as the body's major barrier against an inhospitable environment....
and subcutaneous tissues, and is composed of two layers, the papillary

Papillary dermis

The papillary dermis is the uppermost layer of the dermis, intertwined with the rete ridges of the epidermis, composed of fine and loosely arranged collagen fibers....
and reticular dermis

Reticular dermis

The reticular dermis is the lower layer of the dermis, composed of thick, densely packed collagen fibers, and the primary location of dermal elastic fibers....
. Structural components of the dermis are collagen

Collagen

Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals, making up about 25% to 35% of the whole-body protein content....
, elastic fibers, and extrafibrillar matrix (previously called ground substance

Ground substance

Ground substance is a term for the non-cellular components of extracellular matrix containing the fibers.It is usually not visible on slides, because it is removed during the preparation process....
).

Dermis

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