______________ Is the Carrier Molecule That Transports Oxygen Through the Circulatory

Q16: The _ is a covering over the

Q17: Mammal lungs are surrounded on the outside

Q18: The most efficient lungs are found in

Q19: Most of the primitive phyla of invertebrates

Q20: The blood obtains its oxygen by diffusion

Q22: Which of these animals has one-way flow

Q23: _ are used for respiration by terrestrial

Q25: Fick's law of diffusion states that the

Q26: In emphysema,the aveoli are reduced in number

Q44: Protruding papulae on the surface of echinoderms