do this
.
.
.
write 5 lines
.
on functions of lips..
Answers
The Functions of the Human Lip
Lip’s – we all have them, even other animals do as well… let’s talk a little bit about the reason we have lips and it’s functions.. some education for you all!
Food intake
Because they have their own muscles and bordering muscles, the lips are easily movable. Lips are used for eating functions, like holding food or to get it in the mouth. In addition, lips serve to close the mouth airtight shut, to hold food and drink inside, and to keep out unwanted objects. Through making a narrow funnel with the lips, the suction of the mouth is increased. This suction is essential for babies to breast feed. Lips can also be used to suck in other contexts, such as sucking on a straw to drink liquids.
Articulation
The lips serve for creating different sounds — mainly labial, bilabial, and labiodental consonant sounds as well as vowel rounding — and thus are an important part of the speech apparatus. The lips enable whistling and the performing of wind instruments such as the trumpet, clarinet, flute and saxophone. Persons who have hearing loss may unconsciously or consciously lip read to understand speech without needing to perceive the actual sounds.
Tactile organ
The lip has many nerve endings and reacts as part of the tactile (touch) senses. Lips are very sensitive to touch, warmth, and cold. It is therefore an important aid for exploring unknown objects for babies and toddlers.
Erogenous zone
Because of their high number of nerve endings, the lips are an erogenous zone. The lips therefore play a crucial role in kissing and other acts of intimacy.
A woman’s lips are also a visible expression of her fertility. In studies performed on the science of human attraction, psychologists have concluded that a woman’s facial and sexual attractiveness is closely linked to the makeup of her hormones during puberty and development. Contrary to the effects of testosterone on a man’s facial structure, the effects of a woman’s oestrogen levels serve to maintain a relatively “childlike” and youthful facial structure during puberty and during final maturation. It has been shown that the more oestrogen a woman has, the larger her eyes and the fuller her lips, characteristics which are perceived as more feminine.[8] Surveys performed by sexual psychologists[who?] have also found that universally, men find a woman’s full lips to be more sexually attractive than lips that are less so.[citation needed] A woman’s lips are therefore sexually attractive to males because they serve as a biological indicator of a woman’s health and fertility. A woman’s lipstick (or collagen lip enhancement) attempts to take advantage of this fact by creating the illusion that a woman has more oestrogen than she actually has, and thus that she is more fertile and attractive.
Lip size is linked to sexual attraction in both men and women. Women are attracted to men with masculine lips, that are more middle size and not too big or too small; they are to be rugged and sensual. In general, the researchers found that a small nose, big eyes and voluptuous lips are sexually attractive both in men and women. The lips may temporarily swell during sexual arousal due to engorgement with blood.[medical citation needed]
Facial expression
The lips contribute substantially to facial expressions. The lips visibly express emotions such as a smile or frown, iconically by the curve of the lips forming an up-open or down-open parabola, respectively. Lips can also be made pouty when whining, or perky to be provocative