There are three types of blood vessels in the human body. These are the arteries, vessels and the capillaries. If a child’s blood vessels are joined end to end, they would measure 96,560.64 km (60,000 miles), or they could encircle the earth two and a half times. The average adult’s blood vessels measure 1,60,934.4 km…
Every minute 750 ml of blood gets pumped through your brain, which is merely 15–20 per cent of blood flow from the heart. An adult brain requires about 20 per cent of the body’s oxygen. To meet this requirement, and other metabolic needs of the neurons, approximately 20 per cent of the blood flow is directed…
During fertilization of the egg by the sperm, the DNA of the sperm is injected into the egg. Both the sperm and the egg have a single set of chromosomes each, but the fertilized egg receives the DNA from the sperm and comes to possess both the sets of chromosomes. This fertilized egg cell stays…
Chromosomes are considered the basic structures of heredity. They carry the codes that give rise to the expression of the characteristic features of an organism. Humans have 46 chromosomes. In 1997, a team of scientists J.J. Harrington, G.V. Bokkelen, R.W. Mays, K. Gustashaw, and H.F. Willard synthesized artificial chromosomes. These chromosomes are stable up to…
The fastest moving muscle in the human body is the one that closes the eyelid. This muscle is called the orbicularis muscle. The opening or closing of the eye, or the blink of the eye, was used for measuring time in ancient India. The Vedic texts designated the blink of an eye as a nimish….
Human beings have over 600 separate muscles in the body. Tendons connect bones to the muscles. There are three types of muscles, skeletal, smooth and cardiac. Muscles enable movement. We use 43 muscles to frown, 17 muscles to smile, and 54 muscles every time we step forward.
