Explanation

Tetanus is a bacterial infection that can cause muscle stiffness and spasms.

It particularly in the jaw muscles, leading to the characteristic symptom of "lockjaw".

Explanation

Meter is the SI unit of length.

It is used to measure distance or height.

Explanation

The cranium is the bony structure that encloses and protects the human brain.

It is also known as the skull.

It forms the upper part of the skull.

It providing a protective casing for the brain.

Explanation

• A newborn infant has about 300 bones.
• It fuse to form the 206 bones typical in adults.
• The human skull has 22 bones.
• The hand contains 27 bones.

Explanation

Optical fibers transmit data as light signals.

The signal is confined within the fiber due to the phenomenon where light hits a medium boundary.

It is completely reflected back.

Explanation

The atmospheric pressure at any place is measured by a Barometer

***

The barometer was invented by Evangelista in 1644.

**

Explanation

The main idea of the solar system was proposed by the Polish astronomer Nicolaus Copernicus (1473-1543).

who said that "the Sun is the centre of the Universe" and made the planets move around it in perfect circles

(in his book entitled, "On the Revolution of the Celestial Spheres", written in Latin and published in 1543)

Explanation

Bronchitis is a disease related to the respiratory tract.

It is characterized by inflammation of the bronchial tubes.

It leads to coughing and breathing difficulties.

Bronchitis is a condition that develops when the airways in the lungs.

It usually happens because of a virus that irritates the lungs

such as:

• tobacco smoke
• fumes
• dust
• and air pollution

Explanation

Explanation

Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that is essential for various bodily functions, such as:

• Collagen production
• Wound healing
• Iron absorption
• Antioxidant functions

Vitamin C is one of the most well-known vitamins and is found in many fruits, vegetables, and other foods.