The respiratory system consists of your lungs, trachea, and oral/nasal passage. There are 2 lobes of lung tissue in your left lung and 3 lobes in the right. The bronchi are upper airway and the trachea is the a cartilaginous tube that connects the nasal and oral airway leading to your bronchi and lungs. The epiglottis is a muscular valve that allows for breathing or swallowing. When you swallow, it opens and closes to allow food to pass into your esophagus and bypass the airway.
system
Muscle of course!
Our solar system and everything in it.
About 98 percent of the mass of the solar system is in the Sun.
kidneys, ureters, bladder, and urethra
the government makes up the school system
system
skeletal system makes up frame of the body
yes it is
don't know
Muscle of course!
the bones.
it makes up of molecules that have an even concentration throughout the system.
TesticlesUrethraPenis.Accessory glands
The Judicial.
Our solar system and everything in it.
Organ system