Trendelenberg-the best for pulling up a heavy patient in bed! Patient positioning - KNOW THIS. So when your patient is suddenly hypotensive, you can trendelenberg them to get that pressure up or do a passive leg raise.
Skeletal Anatomy (Posterior View)- reference for ripped out angel wings- obviously as no such thing exists a bit of artistic license would have to be used when deciding how and where the wing bones would join to the skeleton.
These different types of lighting create different gradients and colours of light giving an image more meaning and depth. The way the light is enables the image to be more interesting and direct to what you want for your shoot.