Explanation

Explanation

Macro is not a human bone joint

Explanation

Our arm is made up of three bones: the upper arm bone (humerus) and two forearm bones (the ulna and the radius).

Explanation

Medulla Mblongata controls heart and manages breathing.

Explanation

Smell is generally considered the strongest human sense

 Humans have five basic senses:

1. touch,
2. sight,
3. hearing,
4. smell
5. taste.
   

Explanation

The pulmonary arteries are the only arteries that contain oxygen-poor blood because it carries blood into the lungs to be oxygenated

Explanation

New born child has 300 bones.

Longest bone: Femur (thigh bone)

Shortest: Stapes (one of the 3 small bones inside the ear)

Human head has 22 bones

Explanation

Most people are born with 12 ribs on each side of the body, making a total of 24 ribs.

Some people are born with more than 24 ribs.

These extra ribs are called supernumerary ribs.

When people are born with less than 24 ribs,

it is called agenesis of the ribs.

Explanation

Lactic acid is formed in muscles as a result of the anaerobic metabolism of glucose.

Muscle cramps are caused by an accumulation of lactic acid in the muscles

Explanation

Ultra Violet rays: most harmful and are almost completely absorbed by our atmosphere.