Name _________________. Overview. In this activity, you will study the effects of gravity on the planets of the Solar System. First, you need to view movies from the lunar Apollo missions, then calculate your weight on other planets. Finally, you will propose your weight on newly discovered planets around other stars.
A tracheostomy is an opening cut into the windpipe, or trachea. It is used as an airway for breathing. After the opening is made, a small tube is inserted to let air in, and to attach a breathing machine (mechanical ventilator) if needed.
Another type of tracheostomy is that which is done in an emergency. This is required if someone has problems breathing due to an obstruction in their throat or has sustained an injury to their airway. For example, this procedure can be done by a paramedic at the scene of an accident.