A Thin Slice of Lung Tissue Looks Like a Cross-

Q30: A layer of smooth muscle in the

Q31: If a respiratory surface dries out, gas

Q32: Which of the following structures is NOT

Q33: What happens during inhalation?<br>A) Air exits the

Q36: Which of the following occurs in the

Q37: Which sequence of animals represents the evolution

Q39: What keeps the trachea from collapsing?<br>A) Surface

Q40: Which of the following represents the correct

Q56: All flatworms use their skin as a

Q92: The surface area of all respiratory systems