Platelets, also called thrombocytes, are tiny blood components responsible for blood clotting. They gather at injury sites and help form clots to stop bleeding, preventing excessive blood loss and supporting wound healing.

Pepsinogen is an inactive enzyme released by the stomach lining that converts into pepsin in the presence of hydrochloric acid. Pepsin plays a major role in digesting proteins into smaller peptides during digestion.

Mars has two natural satellites, Phobos and Deimos. These moons are believed to be captured asteroids and are much smaller and irregular in shape compared to Earth’s Moon.

Ethiopia suffered a devastating famine during 1983–1985 due to drought, conflict, and economic problems. Millions were affected, and the crisis drew global humanitarian attention and international relief efforts.

Stomata close when guard cells lose water and become less turgid. This process helps plants reduce water loss through transpiration, especially during hot or dry environmental conditions.