An increase in the volume of the thoracic cavity _________ the intra-alveolar pressure, which causes __________.

As fatty acids are absorbed, the resulting fat molecules are coated in protein for what reason?

________ and the smaller air passageways are not lined with ciliated mucosae and cannot effectively remove the inhaled particles.

__________ is the formation of fatty deposits along the tunica intima of arterial walls.

The hollow space inside of the digestive tract is the ________.

Much of the mucus in the mouth comes from the _____________ salivary gland under the tongue.

The __________ serves as a center for receiving and integrating sensory input and sending nerve impulses to another respiratory center to make necessary changes in the breathing pattern.

The exchange of oxygen and carbon dioxide between air in pulmonary alveoli and blood in capillaries occurs by ______.

Platelets are produced from cells called ______.

The inhaled air enters each lung lobe through a ______.