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.
1 The incision may be in the form of a flap or a small segment the tracheal ring may be removed (Figure 5) 2  The tracheostomy tube, the metal or plastic tube to be placed in the trachea, is measured for size to fit the trachea.  The anesthetist slowly withdraws the endotracheal tube through the mouth.