The Water Cycle: The U.S. Geological Survey explains what the water cycle is and where water comes from. Animated Water Cycle: This animated water cycle diagram allows kids to click on different parts of the cycle to see how water changes form and moves.
The neuromuscular junction (NMJ) is the site of communication between motor nerve axons and muscle fibres. It is composed of four specialised cell types: motor neurons, Schwann cells, muscle fibres and the recently discovered kranocytes.
The Temporomandibular Joint. The TMJ, or temporomandibular joint, is the joint that connects the lower jaw to the skull. Actually, two temporomandibular joints are located just in front of the ears, one on each side of the jaw. The TMJ joint allows you to move your lower jaw so you can talk and chew.