As the title implies, this video describes how muscles work. It shows the anatomy of the muscle in relation to bone but also the structure of muscle at the microscopic level.

This video shows precisely what a surgeon sees during a laparoscopic cholescystectomy. A laparoscopic cholescystectomy is gallbladder removal surgery using small incisions and cameras rather than a large abdominal incision. This video may be difficult for some viewers since it shows surgery on actual human tissue.

The 2D animation explains the process involved in a male cystoscopy procedure. A cystoscopy is a procedure that allows a urologist to see inside the urinary bladder. Note that the instruments shown in the animation are smaller relative to the patient in an actual cystoscopy.

An artist's rendition of the body at the microscopic level is narrated in this video. It describes how bacteria enter the body during an infection and how the cells of the immune system mount an organized attack to fight the infection.