What Is the Umbilical Cord?
What Is the Umbilical Cord? Inside the womb of a pregnant woman or animal, a placenta is formed, through which the unborn baby is nourished. The baby is connected to...
Read More
What Is Muscle?
What Is Muscle? Muscle is the body tissue which, because it has the power of contraction, enables the higher animals to move their bodies. Muscles are divided into two...
Read More
When Do Doctors Give Electric Shocks?
When Do Doctors Give Electric Shocks? Electric shock treatment, or electro convulsive therapy, is sometimes used with people suffering from mental illnesses in which...
Read More
When Does Blood Congeal?
When Does Blood Congeal? Blood congeals when a part of the body is wounded. If it failed to congeal the injured person would die from loss of blood. The congealing, or...
Read More
What Is a Side Stitch?
What Is a Side Stitch? A stitch is simply a sharp pain in one’s side. It is an intense stabbing pain under the lower edge of the rib-cage that occurs while exercising....
Read More
Who First Used a Powered Dental Drill?
Who First Used a Powered Dental Drill? The first powered dentist’s drill was made by George Washington’s dentist, John Greenwood, who adapted his mother’s spinning...
Read More
Why Are Some People Color Blind?
Why Are Some People Color Blind? Scientists think that some people are color blind because they have an abnormality of the three pigments in the cones in the retina of...
Read More
Why Do We Have Brains?
Why Do We Have Brains? The brain directs and coordinates movements and reflexes, registers sensations and is the supreme nervous organ by which man acquires knowledge...
Read More
Who Discovered Typhoid Vaccine?
Who Discovered Typhoid Vaccine? Typhoid vaccine, which gives immunity against typhoid fever, was discovered by Sir Almroth Wright (1861-1947), a British scientist...
Read More
What Is the Purpose of Bones in Human Body?
What Is the Purpose of Bones in Human Body? We have bones to give us shape and support the body, to protect and contain the body’s delicate vital organs, and to help us...
Read More