Chara (alga) Chara is a genus of charophyte green algae in the family Characeae. They are multicellular and superficially resemble land plants because of stem-like and leaf-like structures. They are found in fresh water, particularly in limestone areas throughout the northern temperate zone, where they grow submerged, attached to the muddy bottom.
The eustachian tube (also known as the auditory tube or the pharyngotympanic tube) joins the tympanic cavity with the nasal cavity (nasopharynx), allowing pressure to equalize between the middle ear and throat.
levels are equal-pressure of the gas is the same as the atmosphere, right side is higher than the other-pressure of the gas is greater than the pressure of the atmosphere (add the atmospheric pressure to the height), left side is greater than the right-pressure of the gas is less than the pressure of the atmosphere (subtract the height from the ...