Respiratory System

3. sheet of muscle separating the chest cavity from the abdominal cavity
4. one of a pair of bands of elastic tissues in the larynx
10. the maximum of volume that a mammal can inhale and exhale with each breath
11. one of millions of tiny dead-end sacs within the vertebrate lungs where gas exchange occurs
12. a mechanism that provides contact between an animals respiratory surface and or water to which it is exposed
13. one of a pair of breathing tubes that branch from the trachea into the lungs
15. a breathing system in which air is pulled into the lungs

1. the transfer of a substance or heat between two fluids flowing in opposite directions
2. a brain center that directs the activity of organs involved in breathing
5. an iron containing protein in red blood cells that reversibly binds o2 and transports it to body tissues
6. a substance recreated bu alveoli that decreases surface tension in the fluid that coats the alveoli
7. the voice box, containing the vocal chords
8. a thin breathing tube that branches from a bronchus within a lung
9. a measure of the relative amount of gas in a mixture
14. organ in digestive tract that receives food from the oral cavity