â¢ Both fluids mainly composed of water, but there are more ions in the extracellular fluid than in intracellular fluid. â¢ Glucose is present in both fluids, but extracellular fluid does not have organelles to break those down to produce energy but intracellular fluid does.
Spirit Airlines allow all passengers to bring one personal item, like a briefcase, purse or small backpack, into the cabin with them, but youâll have to pay extra if you want to bring a larger piece of carry-on luggage or check a suitcase into the hold.
1 Spirit Airlines does not require a health certificate for pets traveling with customers in the aircraft cabin. 2  Spirit only allows small domestic dogs, domestic cats and small household birds on the aircraft. Spirit Airlines does not transport pets in Cargo at any time. 2  International Travel. 3  Spirit Airlines does not accept animals on international flights, except in the case of service animals. 4  Depending on the international destination, specific documentation regarding the service animal may be required.