Child's leg with bone structure visible to show placement of interosseous catheter in the tibia; inset shows cross-section of tibial tuberosity with catheter needle in place within the bone.

Cross-section of arm at level just above elbow showing arrangement of muscles around central bone. Orientation drawing in upper left corner.

Technique for intramuscular injection in children, anterolateral thigh site; illustration shows cross-section of thigh at injection site indicating location of desired muscle (vastus lateralis m. ).

Two cross-sections of the right hand at the level of the wrist to show the anatomy involved in carpal tunnel syndrome. Orientation drawing upper left.

Three skin sections showing three levels of burns; (top) effects of a first-degree burn on the skin layers; (middle) effects of a second-degree burn; note blistering of epidermis. (bottom) effects of a third-degree burn.; note charring and loss of

Level of section is shown in leg.