The deep vascular inner layer of the skin.
1These occur as thickenings and down-growths of the epithelium into the corium.
2The second layer is called the corium, derma cutis vera, or true skin.
3Blood was dribbling out of the fissures between scabs of crisped corium layers.
4They are developed over a modified portion of the corium known as the nail-bed.
5The skin-fibre layer forms the corium and the motor organs-theskeleton and the muscular system.
6Together with the lens the small underlying piece of corium-plate also separates from the skin.
7The right portion of the figure pictures the corium.
8It shows a pronounced epithelial ingrowth into the corium (Mettam).
9After birth these fissures may extend down into the corium, and on movement produce much pain.
10The corium is much thicker than the epidermis.
11A three-pointed tooth rises obliquely on each of the quadrangular bony plates that lie in the corium.
12The main portion of the wall is developed from the numerous papillæ covering the corium of the coronary cushion.
13For the most part the papillæ contain looped capillary vessels, rendering the superficial layer of the corium extremely vascular.
14Immediately above the corium is the outer skin (epidermis, o), the general covering of the whole outer surface.
15The epithelial ingrowths hang down from the epidermis into the corium like the teeth of a comb (Mettam).
16From these are formed the skull, the bony case of the brain, and the muscles and corium of the body.