Patrick is observing a stained slide of muscle tissue under a microscope. he observes alternating dark and light bands inside the muscles. which is the probable source of these muscles?

blood vessels

skeletal muscles

smooth muscle

The answer is Skeletal muscles.

Smooth muscle under the microscope look spindle shaped and have no bends, either dark or light. Blood vessels are usually oval shape under the microscope. On the other hand, under the microscope, dark and light bands can be observed inside the skeletal muscles. Dark bands are from thick muscle filaments, while light bands are from thin muscle filaments.