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

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

• Neurons are the basic structural and functional units of the nervous system.
• They are specialized nerve cells.
• They transmit electrical and chemical signals.
• They control communication in the body.
• Brain, spinal cord, and nerves are made up of neurons.

Last verified on 08-06-2026

Explanation

• The kidneys purify the blood in the human body.
• They remove waste materials and extra water.
• Kidneys help maintain the body’s chemical balance.
• Each person has two kidneys.
• They produce urine as a waste product.

Last verified on 07-06-2026

Explanation

• The Cerebellum controls body balance and coordination.
• It helps in smooth movement of muscles.
• It is also involved in simple learned (conditioned) responses.
• It works with other brain parts to maintain posture.
• Damage to it causes loss of balance and shaky movements.

Last verified on 07-06-2026

Explanation

• The average normal body temperature is generally accepted as 98.6°F (37°C).
• A temperature over 100.4°F (38°C) means you have a fever.

Additional Information:

• Hypothermia is the term used for temperature less than 36.50°C.
• Mild Pyrexia is the term used for temperature (99-100°F).
• Moderate Pyrexia is the term used for temperature (100-103°F).
• Severe Pyrexia is the term used for temperature (103-105°F).

Explanation

• Total bones in adult human body = 206
• At birth = 270–300 bones (fuse to become 206)

The total bones of our body can be divided into:

• Axial skeleton = 80 bones
• Appendicular skeleton = 126 bones

Additional information:

• Newborn baby has 300 bones
• Longest bone = Femur
• Shortest bone = Stapes
• Bones in human skull = 22

Last verified on 30-03-2026

Explanation

• The largest endocrine gland is the Thyroid gland.
• It is located in the neck, below the larynx.
• Produces hormones like thyroxine (T4) and triiodothyronine (T3).
• Controls metabolism, growth, and energy levels.

Last verified on 02-05-2026

Explanation

• Digestion begins in the mouth, starting immediately when food is ingested.
• Both mechanical digestion (chewing) and chemical digestion (salivary amylase breaking down carbohydrates) 

Additional information:

• Mouth: Food is chewed and mixed with saliva that contains enzymes to break down carbohydrates.
• Esophagus: Food is swallowed and passes through the esophagus into the stomach.
• Stomach: Food is mixed with stomach acid and enzymes to break down proteins and fats.
• Small Intestine: Nutrients are absorbed into the bloodstream.
• Large Intestine: Water and electrolytes are absorbed, and waste is eliminated.

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Last updated by NS on 01 MAY 2026

Explanation

• Eccrine sweat glands help regulate body temperature.
• They are most densely found on palms and soles.
• These glands produce watery sweat for cooling.
• They are active throughout the body, especially in these areas.
• This helps maintain body temperature balance.

Last verified on 26-04-2026