Women are known to have anatomically differently shaped tear glands than men as well as having more of the hormone prolactin, which is present in tear glands, as adults.
12.
Women are known to have anatomically differently shaped tear glands than men as well as having more of the hormone prolactin, which is present in tear glands, as adults.
13.
Small amounts of the tear mixture already on the surface of the eye seep out, and without a fresh supply of liquid from the tear gland, the fat and protein dry up.
14.
The researchers suggest that the " weeping " may be caused by the hissing of warm air during feeding, which is forced through the sinuses, stimulating the animals'tear glands into emptying fluid into the eye.
15.
One main tear gland, called the lachrymal gland, at the upper outer quadrant of each eye, is responsible for emotional crying, Dolphin explained, while several additional areas produce secretions that keep the eye moist and comfortable.
16.
Still, studies have shown that tears are triggered by nerves that pump out chemical messengers near tear glands and by circulating hormones, says physiologist Darlene Dartt, senior scientist at the Schepens Eye Research Institute in Boston.
17.
Tears have three components : Salty water, which comes from the tear gland behind the upper outer corner of our eye; Protein, secreted by the conjuctiva, which is the clear film that covers the eye; And fat, which comes from ducts in the eyelids.
18.
A . " In order to bring more blood supply to the tear gland, the blood vessels respond to the nervous system by dilating, " said Dr . Kip W . Dolphin, vice chairman of the department of ophthalmology and Bob Hope distinguished professor at Weill Medical College of Cornell University.
19.
_Both emotional and irritant tears contain 30 times more manganese than is found in blood, suggesting that human tear glands can concentrate and remove substances from the body . ( In sea birds like gulls, albatrosses and cormorants, tear glands are more powerful than kidneys at removing toxic levels of salt from the body .)
20.
_Both emotional and irritant tears contain 30 times more manganese than is found in blood, suggesting that human tear glands can concentrate and remove substances from the body . ( In sea birds like gulls, albatrosses and cormorants, tear glands are more powerful than kidneys at removing toxic levels of salt from the body .)
