Home > Health A – Z > Dermis

Dermis

The inner layer of the two main layers of the skin. The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. It is made up of a thin upper layer called the papillary dermis, and a thick lower layer called the reticular dermis.

PubMed Health Glossary
(Source: NIH - National Cancer Institute)

Terms to know

Arteries
A blood vessel that carries blood from the heart to tissues and organs in the body.
Blood Vessels
Tubes that carry blood to and from all parts of the body. The three main types of blood vessels are arteries, capillaries, and veins.
Connective Tissue
Supporting tissue that surrounds other tissues and organs. Specialized connective tissue includes bone, cartilage, blood, and fat.
Epidermis
The outer layer of the two main layers of the skin.
Hair Follicle
A shaft or opening on the surface of the skin through which hair grows.
Hair Shaft
The segment of the hair that projects above the skin surface.
Lymphatic Vessels
A thin tube that carries lymph (lymphatic fluid) and white blood cells through the lymphatic system. Also called lymph vessel.
Nerve Fibers
Slender processes of neurons, including the axons and their glial envelopes (myelin sheath). Nerve fibers conduct nerve impulses to and from the central nervous system.
Nerves
A bundle of fibers that receives and sends messages between the body and the brain. The messages are sent by chemical and electrical changes in the cells that make up the nerves.
Papillary Dermis
The thin top layer of the dermis (the inner layer of the skin). The papillary dermis has connective tissue and blood vessels that give nutrients to the epidermis (the outer layer of the skin) and that help control the temperature of the skin.
Reticular Dermis
The thick bottom layer of the dermis (the inner layer of the skin). The reticular dermis has blood vessels and connective tissue that supports the skin. Hair follicles, oil and sweat glands, and other structures are also found in the reticular dermis.
Sebaceous Glands (Oil glands)
Small glands located within the epidermis, and associated with the hair follicle, that produce and secrete an oily substance that lubricates the skin and hair.
Skin
The outer covering of the body that protects it from the environment.
Subcutaneous
Beneath the skin.
Sweat Glands
The small coiled tubes in the skin that produce and secrete sweat.
Tissue
A group of cells that act together to carry out a specific function in the body. Examples include muscle tissue, nervous system tissue (including the brain, spinal cord, and nerves), and connective tissue (including ligaments, tendons, bones, and fat). Organs are made up of tissues.

Terms to know

Arteries
A blood vessel that carries blood from the heart to tissues and organs in the body....
Blood Vessels
Tubes that carry blood to and from all parts of the body. The three main types of blood vessels are arteries...
Connective Tissue
Supporting tissue that surrounds other tissues and organs. Specialized connective tissue includes bone, carti...
See all 16

PubMed Health Blog...

read all...