Explanation

• The normal number of ribs in a human body is 24 (12 pairs).

Additional information:

• Upper ribs: True ribs (1–7 pairs)
• Lower ribs: False ribs (8–12 pairs)
• Floating ribs: Last 2 pairs (11–12)

Last verified on 24-06-2026

Explanation

• On average, the human body contains about 60–70% water.
• Adult males: 60–65%
• Adult females: 50–60%
• Infants: ~75%
• Main functions: transport, digestion, temperature regulation

Last verified on 23-06-2026

Explanation

• The cerebellum controls body posture, balance, and coordination.
• It helps muscles work smoothly during movement.
• It ensures the body stays balanced while standing or walking.
• It coordinates voluntary muscle actions.
• Damage to it causes loss of balance and shaky movements.

Last verified on 21-06-2026

Explanation

• The retina is the light-sensitive layer located at the back of the human eye.
• It contains special cells called rods and cones that detect light and color.
• These cells convert light into electrical signals.
• The signals are then sent to the brain through the optic nerve to produce vision.

Last verified on 11-03-2026

Explanation

• The part of the eye that controls the amount of light entering is the Iris.
• It adjusts the size of the pupil according to light intensity.
• In bright light, it reduces light entry; in dim light, it allows more light in.
• This process protects the retina and helps clear vision.

Last verified on 17-05-2026