Questions

We know that the circulatory system of our body is a loop. The Heart is the pump, the arteries and their smaller branches (arterioles) carry oxygen rich blood all through your body tissues from the heart and the veins and their smaller branches (venules) carry oxygen depleted blood and waste products back to the heart from all the body parts.

Allows for expansion or contraction of the trachea. Hence, so large masses of food can pass through the esophagus during swallowing.

Stoichiometry is a branch of chemistry deals with the calculations on reactants and products. It is based on the Law of conservation of mass where total mass of reactants is equal to total mass of products.

The author of the book 'Indica' was Megasthanese.

A devastating  series of earthquakes in 1906 ruined the city completely and its presence is a constant remainder of the past and a threat of repetition in future.

A protein that acts as a hormone is INSULIN.

Insulin is a peptide hormone produced by beta cells of the pancreatic islets; it is considered to be the main anabolic hormone of the body.  Insulin helps keeps your blood sugar level from getting too high or too low.