Explanation

• Main mineral in hemoglobin: Iron
• Chemical symbol: Fe
• Location: Red blood cells
• Main function: Oxygen transport throughout the body

Last verified on 12-10-2026

Explanation

• The cerebellum controls balance, posture, and coordination of voluntary movements.
• It helps make movements smooth, precise, and properly coordinated.
• It is located at the back of the brain, beneath the cerebrum.

Additional information:

• Cerebrum: Thinking, memory, intelligence, and voluntary actions.
• Thalamus: Relays most sensory information to the cerebral cortex.
• Medulla oblongata: Controls involuntary functions such as breathing and heartbeat.

Last verified on 10-10-2026

Explanation

• Insulin is produced by the pancreas.
• The pancreas contains clusters of cells called the Islets of Langerhans.
• Beta (β) cells within these islets produce and secrete insulin.
• Insulin helps regulate blood glucose (sugar) levels by promoting glucose uptake into cells.

Last verified on 07-09-2026

Explanation

• The human respiratory system exchanges oxygen and carbon dioxide between the body and the environment.
• Oxygen enters the blood through the alveoli in the lungs.
• Carbon dioxide moves from the blood into the alveoli and is expelled during exhalation.
• Oxygen is used by cells for cellular respiration and energy production.

Last verified on 10-10-2026

Explanation

• Digestion is the process of breaking down large food particles into smaller, simpler substances.
• It enables the body to absorb nutrients from food.
• Digestion involves mechanical and chemical processes.
• The digestive system includes the mouth, stomach, and intestines.

Additional information:

• Absorption: Movement of digested nutrients into the blood or lymph.
• Assimilation: Use of absorbed nutrients by body cells.

Last verified on 10-10-2026

Explanation

• Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.
• Prothrombin is a vitamin K-dependent protein directly involved with blood clotting.

• Vitamin C may protect the body against the effects of pollution.
• It may also prevent blood clots and reduce bruising.

Last verified on 31-03-2026

Explanation

• Flowers are the reproductive structures of plants.
• It is responsible for producing seeds and facilitating sexual reproduction.
• They contain the male and female reproductive organs.
• They are essential for the production of fruits and seeds.

Last verified on 18-03-2026

Explanation

• The liver is the largest gland in the human body.
• It is situated in the right upper quadrant of the abdomen, beneath the diaphragm, and above the stomach.
• It is reddish-brown.
• It is weighs approximately 1.5 kg.

• The pineal gland is the smallest gland.
• It about the size of a grain of rice.
• It weighs approximately 150 mg.
• It is part of the endocrine system.

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

• Scurvy Cause: Vitamin C (ascorbic acid) deficiency. 
• Symptoms: Fatigue, weak and sore limbs, bleeding gums, easy bruising, delayed wound healing, and anemia. 

Additional information:

• Rickets: Caused by a deficiency in Vitamin D.
• Beriberi: Caused by a deficiency in Vitamin B1 (Thiamine).
• Night Blindness: Caused by a deficiency in Vitamin A.

Last verified on 09-10-2026