General functions of the integumentory system: Protection, sensation, temperature regulation, vitamin D production, Excretion: 3 Layers of skin: Epidermis- top, superficial, epithelial Dermis- deep layer of connective tissue Subcutaneous tissue- not part of skin, loose connective tissue that connects to underlying layers From deepest to most superficial, name and describe the five strata of epidermis
North American X-15. If the type of engine is not limited to jet-powered engines, then the North American X-15 is the fastest airplane. Powered by a rocket engine, the X-15 is said to have reached a speed of 4,520 miles (7,274 km) per hour. Like the X-43, it is launched mid-air from a B-52.
Long considered the fastest passenger plane, the Boeing 747 has several variants, each with slightly different speeds. The fastest of them are the 747-400, 747-400ER and 747-8L, all of which can cruise at Mach 0.855ish, and have top speeds of Mach 0.92.