Advanced Cardiac Life Support. A training course in resuscitation techniques for health care providers offered by the American Heart Association. See: life support for illus. ADVANCED CARDIAC LIFE SUPPORT: Mannequin used for training. advanced cardiac life support Abbreviation: ACLS. ADVANCED CARDIAC LIFE SUPPORT: Mannequin used for training. 1.
The best stones for making arrowheads include flint, chert, obsidian, jasper, quartzite and other stones that are somewhat brittle and have a fine-grained, uniform texture that is free of cracks, fissures, and fractures. Glass and porcelain can also be used. You can also tap the stone and listen to the pitch.
Arrowheads, objects fixed to the end of a shaft and shot with a bow, are only a fairly small subset of what archaeologists call projectile points. A projectile point is a broad category of triangular pointed tools made of stone, shell, metal, or glass and used throughout prehistory and the world over to hunt game and practice warfare.