The epiglottis is a flap of tissue that covers the trachea during swallowing, preventing food masses from entering the respiratory system. Additionally, the larynx closes to protect the airway while eating or drinking.
Density differences is usually what would keep air masses separate.
Dust can enter the outer ear, which can be washed just like any other body part. The eardrum prevents dust from entering the middle ear.
If a 100 amp breaker keeps tripping there is an overload on the system.
The phospholipid bilayer.
it keeps it in orbit
The epiglottis is the flap that prevents food and water from entering the trachea.
A closed system is designed to keep additional atoms from entering or exiting. An insulated system prevents heat from entering or exiting.
You have a sort of flap in the back of your throat called the epiglottis. When you swallow, the epiglottis flaps down over your trachea (windpipe) which prevents food from entering your respiratory system. So the epiglottis is what keeps food from entering the respiratory system.
the epiglottis
the eustachian tube
Density differences is usually what would keep air masses separate.
jaquasia
the eustachian tube
transportation is one
The Epiglottis
the eustachian tube
the circulatory system is the heart, it keeps you alive and keeps your blood pumping!