The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface. (What function do these cilia serve in the trachea?) Mucus-secreting unicellular gland cells (goblet cells) are interspersed among the ciliated cells.
Donât think you need to be able to do the modified version perfectly before you try theseâyou just need to feel brave enough to go upside down. To complete a handstand push up: 1  Face a wall in a standing position.  Kick your feet up so youâre in a handstand position against a wall.
Accessory Exercises to Help Your Push Ups. 1  Tricep exercises - Your triceps straighten your arm at the elbow, so getting them strong can help any sort of pressing exercise. Overhead extensions, skull-crushers, bent-over extensions, pulldowns, and dips are just some of the exercises you can use to build tricep strength.