Think You Know How Dogs Drink Water?
Why is it that when dogs drink, water seems to go everywhere?
When my dog drinks from her bowl, there is no question, water will end up on the floor. It looks like a sloppy, unorganized way to get a good drink of water.
Researchers at Virginia Tech University have been studying how dogs drink. They say dogs know exactly what they are doing. The animals are actually making precise movements at a high speed. This helps them get the fluid they need when they are thirsty.
It turns out that neither dogs, nor cats, have a full set of cheeks. This means they cannot create suction to drink, like humans or elephants and horses.
Dogs lap, or take up, the water with their tongues curled backward. As they lap, they move their tongues very quickly to build up momentum. That forces the water into a column and up into their mouths.
The Virginia Tech researchers filmed 19 dogs of different sizes and breeds as they drank water. They created different laboratory models to measure tongue motion, and the amounts of water taken in.
Using the data from these experiments, the researchers were able to make a model that shows how a dog drinks water.
The researchers said that since the mouths of dogs and cats are structured nearly the same way, they thought they would drink water the same way, too.
But here is a surprise. The studies showed each family of animals has its own special drinking method.
"We know cats and dogs are quite different in terms of behavior and character," said Sunghwan "Sunny" Jung, a study author and an associate professor of biomedical engineering and mechanics at Virginia Tech.
"But before we did fundamental studies of how these animals drink fluids, our guess was dogs and cats drink about the same way. Instead we found out that dogs drink quite differently than cats," he said.
What is the difference?
Dogs must quickly move their tongues down into the water using momentum to bring the water up and into their mouths. Cats don't bend their tongues to drink like dogs. Cats use less momentum and a more gentle action. They just skim, or barely touch, the surface of the water to drink it.
"Cats tend be viewed as neater, dogs are messier, but dogs really have to accelerate their tongues" to make good use of the way the fluid column works, said researcher Sean Gart, a Virginia Tech graduate student.
Their findings were published in the Proceedings of the National Academy of Sciences.
I'm Anne Ball.
1.no question 毫无悬念；毫无疑问
There is no question of the dramatic impact of his solutions.
2.end up 结束；终结
You'll end up in the business, which is where you belong anyway.
3.take up 开始从事；占据
He will be able to take up his normal routine shortly.
4.build up 增进；加强
In a small bay big waves will never build up.
1.It turns out that neither dogs, nor cats, have a full set of cheeks. This means they cannot create suction to drink, like humans or elephants and horses.
turn out 证明是；结果是
I'm afraid he's going to turn out a sailor, or something hopeless.
I'm sorry to say the shipment didn't turn out to be satisfactory.
2.They created different laboratory models to measure tongue motion, and the amounts of water taken in.
take in 吸收；理解；欺骗
The kind old lady offered to take in the poor homeless stranger.
If the skirt is too big, we can take in the waist.
要是裙子太大了, 我们可以把腰部收紧一些 。
毫无疑问，我的狗用碗喝水时，水会打湿整个地板 。这种喝水的方式看起来真的是邋遢至极 。
美国弗吉尼亚理工大学的研究人员正在研究狗狗们如何喝水 。他们表示，狗狗们当然知道自己的行为 。要知道即便在很快的速度下，动物们也能精准地完成高难度动作 。当动物感到饥渴时，这项技能就显得尤为重要 。
然而事实证明，无论是猫还是狗，他们的面部构造都比较特殊 。这就意味着他们无法像人类或是大象和马一样吮吸 。
狗通过向后弯曲舌头来喝水 。当用舌头轻拍水面时，狗狗会快速地摆动舌头制造一种冲力，这股力量将水旋为柱形直接进入口腔 。
研究人员挑选了19个不同体型和种类的狗进行喝水试验 。他们用不同的试验模型来测量狗的舌头运动速率和吸入的水量 。
但是事实却出人意料 。研究发现不同类型的动物其喝水的方式也千差万别 。
Sunghwan解释称“从行为和性格方面来看，我们知道猫和狗是完全不一样的 。”Sunghwan "Sunny" Jung是美国弗吉尼亚理工大学生物医学与工程力学领域的副教授 。
“在开始这项动物是如何饮用液体的研究之前，我们一直认为猫和狗是和饮水方式是一样的 。”而现在我们知道狗和猫的饮水方式完全不同 。
狗把舌头伸进水里，当舌头转动时，会兜起一段水柱带入口中 。而猫却无法像狗一样卷起舌头喝水 。猫喝水的方式较为优雅 。它们只是蜻蜓点水似的轻触水面 。