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.
The SR-71 Blackbird.mashleymorgan / Flickr. The world's fastest manned planes are nothing short of engineering marvels. Capable of flitting through the air at multiple times the speed of sound, these planes take the pilot to the fringe of science fiction. Although a number of these aircraft have since been retired, they continue to be the fastest manned aircraft in history.