Explanation

The heart is the first organ to form in the developing fetus.

Heart is formed after one month of pregnancy.

Explanation

A child has just 20 teeth

Most kids have their first set of teeth by the time they are 3 years old.

These are called the primary teeth, baby teeth, or milk teeth 

Explanation

Homo sapiens, (Latin: “wise man”) is the species to which all modern human beings belong

All modern humans are classified into the species Homo sapiens, coined by Carl Linnaeus in his 1735 work Systema Naturae.

The generic name "Homo" is a learned 18th-century derivation from the Latin homō, which refers to humans of either sex.

Explanation

On average, we take roughly 20,000 breaths per day.

Explanation

The presence of lactic acid in milk is due to the fermentation of lactose caused mainly by lactic bacteria

Explanation

Fibrin is actively formed on the surface of activated platelets.

Explanation

Spinal Cord means ریڑھ کی ہڈی

Explanation

A hemoglobin test measures the amount of hemoglobin in our blood.

Explanation

Explanation

Calcium is a mineral that is necessary for life.