Dogs do sweat. Sweating is a physiological response to heat where sweat glands secrete salty water. When the water evaporates, it takes energy with it, cooling down the organism in the process. Although dogs don't sweat profusely and visibly the way humans do, they definitely have sweat glands that secrete

As part of the maturation process, human red blood cells destroy their cell nuclei. They do this in order to carry as much oxygen as possible and still stay small enough to fit through narrow blood capillaries, thereby maximizing the oxygen delivery. In fact, humans have some of the smallest

Swallowed chewing gum does not stay in your system for seven years. Gum, along with anything else inedible, passes from your mouth into the toilet in about a day or two, according to Dr. Michael Picco of the Mayo Clinic. Perhaps this misconception is popular due to the fact that

Human finger tips do not become wrinkled because they absorb water. Skin is a fairly good barrier that keeps out most of the external water. If our fingers did absorb a significant amount of water after staying in the pool or bath for several minutes, then our fingers would swell

Camera flashes do not make your eyes turn red. The inside of your eyes are always red. The bright light of the camera flash just makes the color more obvious. Your eye is essentially a hollow ball filled with clear fluid. The hole at the front of your eye, the

Most people with color blindness can see almost all colors. They are typically only blind to a few colors. Furthermore, they are not completely blind to those colors, but are only partially blind. The human eye contains three types of color detecting cells: red-detecting cones, green-detecting cones, and blue-detecting cones.

All parts of the tongue can taste every flavor. The tongue, and indeed the sides of the mouth, the epiglottis and other tissues are all covered with taste buds. Each taste bud contains many taste cells that can taste different flavors. According to the textbook "Neuroscience" edited by Dale Purves,

The brains of humans are not the biggest compared to all other animals. The average human brain has a mass of about 1 kg. In contrast, the brain of a sperm whale has a mass of 8 kg and that of an elephant has a mass of 5 kg. You

Bats are not blind and can in fact see quite well using their eyes. While most bats do have advanced ears that give them a form of vision in the dark known as echolocation, these good ears does not require them to have bad eyes. Bats use their good hearing

From one point of view, the original cell you came from (the fertilized egg cell) was destroyed long before your body was formed. From another point of view, every cell in your body is the original. In either case, there is not just one original cell sitting in your elbow