Explanation

• Germs are microorganisms that can cause disease.
• When germs enter a wound, they may cause an infection.
• Keeping germs out of wounds helps prevent infection.

Last updated 24-07-2026 by NA

Explanation

• The Aorta is the largest artery in the human body.
• It carries oxygen-rich blood from the left ventricle of the heart to the rest of the body.
• It is the main artery of the systemic circulatory system.
• The aorta branches into smaller arteries to supply blood to all body organs except the lungs.

Additional information:

• Arterioles are the smallest branches of arteries.
• They carry oxygenated blood from arteries to the capillaries.
• Arterioles regulate blood flow and blood pressure by constricting or dilating.

Last verified on 21-07-2026

Explanation

• First Polio Vaccine Introduced: 1955
• Developer: Dr. Jonas Salk
• Type: Inactivated Polio Vaccine (IPV)
• Oral Polio Vaccine (OPV): 1961
• Developer of OPV: Dr. Albert Sabin

Last verified on 20-07-2026

Explanation

• Malaria is caused by the parasite Plasmodium.
• It is transmitted to humans through the bite of an infected female Anopheles mosquito.
• Malaria is a parasitic disease.
• It mainly affects the liver and red blood cells.
• Common symptoms include fever, chills, headache, and sweating.

Last verified on 11-07-2026

Explanation

• The age of a tree is determined by its Rings (Number of Annual Rings).
• Each annual ring generally represents one year of growth.
• Counting the rings on the trunk helps determine the tree's age.
• The study of tree rings is called Dendrochronology.

Last verified on 20-07-2026

Explanation

• Gregor Mendel is known as the Father of Genetics.
• He discovered the Laws of Inheritance through experiments on pea plants between 1856–1863.
• His research was published in 1866.

Last verified on 19-07-2026

Explanation

• O⁻ (O Negative) is the universal donor blood group.
• It can be transfused to A, B, AB, and O blood groups.
• O⁻ blood lacks A, B, and Rh (D) antigens.

Additional information:

• Universal Recipient: AB⁺ (AB Positive)
• ABO Blood Groups: A, B, AB, O
• Rh Types: Positive (+) and Negative (−)
• Total Common Blood Groups: 8 (A⁺, A⁻, B⁺, B⁻, AB⁺, AB⁻, O⁺, O⁻)

Last verified on 14-07-2026

Explanation

• Bones do not secrete hormones,
• Hormones are produced by glands in the endocrine system.
• The parathyroid gland secretes parathyroid hormone.
• It regulates calcium levels in the blood and bones.

Addition information 

• Functions performed by bones in the human body:
• Support: Provides a rigid framework for soft tissues.
• Protection: Shields vital organs like the brain, heart, and lungs.

Last updated 18-07-2026 by NA

Explanation

• The lungs are located in the thoracic cavity.
• The thoracic cavity is the chest cavity protected by the rib cage.
• It contains the lungs, heart, trachea, and major blood vessels.
• The lungs are enclosed by the pleural membranes.
• This cavity plays a vital role in breathing and respiration.

Last verified on 18-07-2026

Explanation

• Insulin and glucagon regulate blood glucose (sugar) levels.
• Insulin lowers blood sugar by helping cells absorb glucose.
• Glucagon raises blood sugar by releasing stored glucose from the liver.
• Both hormones are produced by the pancreas.
• They work together to maintain normal blood sugar levels.

Verified & Updated