The Paranasal Sinuses. The paranasal sinuses are air-filled extensions of the respiratory part of the nasal cavity. There are four paired sinuses, named according to the bone in which they are located; maxillary, frontal, sphenoid and ethmoid. The function of the sinuses is not clear.
Kanpur. Kanpur is located 80 km away from Lucknow, the capital of Uttar Pradesh state in India. The rivers Ganges and Yamuna flow in north-east and south side of the city respectively.Kanpur is 1050 sq km in area and 125 m above sea level.anpur. Kanpur is located 80 km away from Lucknow, the capital of Uttar Pradesh state in India. The rivers Ganges and Yamuna flow in north-east and south side of the city respectively. Kanpur is 1050 sq km in area and 125 m above sea level.
Purnia(Hindi : à¤ªà¥à¤°à¥à¤£à¤¿à¤¯à¤¾à¤ ) is a city located in Purnia district in the Indian state of Bihar.It is the 4th largest city of Bihar in terms of Urban area & is located at a distance of nearly 300 kilometers from Patna the capital city of Bihar.