2007-02-22 07:07:33 · 6 answers · asked by In a mission 3 in Arts & Humanities ➔ Philosophy
what tears, where do they come from?
2007-02-22 07:08:00 · update #1
When you stop to think about it, crying is really a mixed signal. You win the lottery and cry tears of joy. You lose the whole pot playing the slot machines in Vegas, and you shed tears again--this time, tears of regret. As you hitchhike across the Nevada desert toward home, you get sand in your eye--fueling yet more tears.
Tears are salty, watery secretions that keep two parts of the eye constantly moist. They flow over the cornea--the transparent coating of the eye--and they lubricate the conjunctiva--the membrane covering the white of the eye and lining the inside of the eyelids. Doing their job on the cleanup crew, tears also wash away stray bits of dust and grit and help keep your eyes infection-free with a natural antiseptic called lysozyme.
Even though one tear is as good as another, they come from different sources. The tears that constantly keep your eyes moist, called the basic tear secretions, are produced on the conjunctiva and also in the eyelids. The tears that you cry over spilled milk, lost loves and squandered savings are reflex tears, generated from what's called a lacrimal gland in the upper, outer corner of your upper eyelid. These tears spring into action when you get something in your eyes as well.
Some of this overflow ends up in your tear ducts, the pinpoint-size holes located in the inside corners of your lower and upper eyelids. Rather than produce tears, tear ducts act as the drainage ducts through which the tears get washed into your nasal passages. That's right--when you blow your nose after a good cry, you're actually sending a spray of tears into your tissue.
Cry in good health!
2007-02-22 12:05:24 · answer #1 · answered by Third Son of Marianne 3 · 0⤊ 1⤋
The pressure in the eye is increased creating heat signals that travel to the optic nerve which controls the tear ducts as well creating a need for tear drops to rehydrate the eyeballs. The tears are excess hydration or hydration that has not as yet covered the eyeball and reduced the temperature of the eye and therefore the pressure.
2007-02-26 04:49:06 · answer #2 · answered by LORD Z 7 · 2⤊ 0⤋
Define the word lough!
2007-03-02 03:38:48 · answer #3 · answered by Anonymous · 1⤊ 0⤋
From the tear ducts!!
2007-03-02 09:12:51 · answer #4 · answered by just me 4 · 1⤊ 0⤋
this is a very good question, really interested to know the actually fact
2007-03-02 02:52:15 · answer #5 · answered by satya k 2 · 0⤊ 0⤋
what are you stupid
2007-02-27 06:21:00 · answer #6 · answered by Anonymous · 1⤊ 1⤋