Explanation

• The kidney was the first human organ to be successfully transplanted.
• The first successful living-donor kidney transplant was performed on December 23, 1954.
• It was performed by Dr. Joseph Murray and his team in Boston, USA.
• The transplant was between identical twins, Ronald and Richard Herrick.

Last verified on 02-09-2026

Explanation

• A normal human body has one gallbladder.
• The gallbladder is a small, pear-shaped organ located beneath the liver.
• It stores and concentrates bile, which helps digest fats.
• Bile is released into the small intestine during digestion.

Last verified on 02-09-2026

Explanation

• The term “antigen” was coined in 1899 by Ladislas Deutsch (László Detre).
• The word is derived from “antibody-generating” (anti + gen).

Additional information:

• Louis Pasteur is famous for his work on vaccination and germ theory.
• Edward Jenner pioneered the smallpox vaccine.

Last verified on 01-09-2026

Explanation

• The skin is considered the largest organ of the human body.
• It covering an area of about 1.5-2 square meters (16-22 square feet).
• It weighing around 3-4 kilograms (7-9 pounds).

Last verified on 01-09-2026

Explanation

• Phosphorus is not among the top 10 most abundant elements in the Earth's crust.
• Most abundant element in Earth crust is Oxygen.
• Oxygen in the crust is (46. 1%).
• The chemical formula of oxygen (dioxygen) is O2.

List of 10 Most Abundant Elements in the Earth's Crust:

Last verified on 01-09-2026