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