Explanation

• The ovum (egg cell) is generally considered the largest cell in the human body.
• It is the female reproductive cell and can be seen with the naked eye as a tiny dot.
• The ovum is approximately 0.1 mm (100 micrometers) in diameter.
• In contrast, the sperm cell is one of the smallest human cells.

Last verified on 03-09-2026

Explanation

• Largest part: Cerebrum.
• Hemispheres: Two — right and left.
• Main functions: Thinking, memory, intelligence, speech, and voluntary movement.
• Cerebellum: Mainly controls balance and coordination.
• Brainstem: Connects the brain with the spinal cord and controls vital functions.

Last verified on 03-09-2026

Explanation

• The largest bone in the human body is the femur (the thighbone)
• It is located in the upper leg, between the hip and the knee.
• It supports the weight of the body and helps you walk, run, and stand
• It is about 48 centimeters (18 inches) long.

Additional information:

• The lowest part of the backbone is called the sacrum.
• The smallest bone is the stirrup (stapes).
• The strongest bone for its size is the lower jaw or mandible.

Last updated by NA on 09-09-2026

Explanation

• The largest solid internal organ is the liver.
• It weighs approximately 3–3.5 pounds or 1.36–1.59 kilograms.
• It is about the size of a football.

Additional information:

• Skin is the largest external organ of the human body

Last verified on 03-09-2026

Explanation

• DNA stands for Deoxyribonucleic Acid.
• DNA is a biological molecule found in all living cells.
• It carries genetic information from parents to offspring.
• It controls growth, development, and body functions.
• DNA is present in the nucleus of cells (mainly in chromosomes).
• It is made of nucleotides arranged in a double helix structure.
• It was discovered by James Watson and Francis Crick (1953 structure model).

Last verified on 01-06-2026

Explanation

• Liver produces bile, which helps in digestion of fats in the human body.
• Bile is a digestive fluid essential for fat breakdown.
• It is produced continuously by the liver.
• It is stored and concentrated in the gallbladder.
• It is released into the small intestine during digestion.

Last verified on 08-06-2026

Explanation

• The total area of pakistan 881,913 km².
• In old books area of Pakistan is 796096 sq km.
• Pakistan is a country in South Asia.
• Pakistan world's second-largest Muslim population.

Additional information:

• Pakistan is the 33rd-largest country by area.
• The total cultivated area in Pakistan is 25%.
• The total forest area of Pakistan is estimated at 6.20 million hectares.
• The forest cover of Pakistan is 5.7%.

Last verified on 02-05-2026

Explanation

• Humidity is the measure of the amount of moisture (water vapour) in the air.
• A hygrometer is used to measure relative humidity.
• A psychrometer is an example of a hygrometer.
• Relative humidity tells us the ratio of water vapour present in the air compared with the maximum amount the air can hold at a given temperature.
• Humidity is commonly expressed as a percentage (%).

Last verified on 23-08-2026

Explanation

• Venus comes closest to Earth when it is between Earth and the Sun.

• Minimum distance: about 24 million miles (≈ 38 million km).

• This close approach occurs roughly every 584 days.

Additional Information:

• Mercury can be about 33 million miles away when Venus is on the far side of the Sun.

Last verified on 17-01-2026

Explanation

• The law of universal gravitation was proposed by Isaac Newton.
• He introduced it in 1687 in his famous book Principia.
• It explains that every object attracts every other object.
• The force depends on mass and distance.

Last verified on 27-04-2026