Circulatory system: heart, blood vessels, blood; delivers nutrients and oxygen to to every cell in the body and carries away waste. Hemoglobin: specialized protein; contains iron; helps to carry oxygen in bloodstream. Kidneys: two organs that filter the blood, removing waste water, urea, minerals.
Southwest Airlines (WN) will charge $75.00 USD per bag for the third bag and any additional bags. Note: Passengers traveling to/from Belize, Mexico City, Montego Bay, and San Jose, Costa Rica from November 16 through January 16 are limited to 2 checked bags.
Southwest Airlines (WN) allows 1 carry-on bag and 1 personal item (purse, briefcase, laptop bag) per passenger fee free. Carry-on should not exceed the following size and weight restrictions: 50 linear inches (24 x 16 x 10 in) or 127 centimeters (61 x 41 x 28 cm) including handles and wheels.