Cross section of skin showing layers involved for determining first, second, or third-degree burns.

A cross-section of skin showing effects of a third-degree burn on the skin layers; note charring and loss of tissue down into the subcutaneous layer.

Technique for intramuscular injection in children, dorsogluteal site; illustration shows cross-section of pelvic region at injection site indicating location of desired muscle (maximus, medium, minimus gluteal mm. ).

Locations of three types of dissecting aneurysms of aorta shown: type 1 (top left), type 2 (top right) and type 3 (bottom left). Cross-section of wall (bottom right) shows pathological process of splitting of media layer.

Cross-section of medium sized vein showing layers