Anatomy & Physiology: Respiration Unit

3. These of the lungs are the most dense in the body.
5. This is the exchange of gas between an organism and its environment.
6. This type of tissue is very strong and elastic.
7. This is a term for a set of muscles that oppose movements.
8. This type of lining covers the lungs and allows for smooth contact for rough lung tissue.
12. Ribs attach at the _____ spots.
14. This type of pressure is the point of reference when discussing respiration.
17. This type of vertebrae reflects the stress for lifting and walking.
18. Increased pressure is called _______ pressure.
19. This term is coined for blood flow to lung capillaries.
23. The upper respiratory tract is composed of the nasal cavity, oral cavity, pharynx, and this.
25. The 3 classes of ribs are true ribs, false ribs, and these type of ribs.
26. This type of joint is the least mobile between two bones.

1. The cells are spread out in this type of tissue; most abundant type of tissue.
2. The ______ girdle is skeletal support for upper extremities.
4. Within the cervical vertebrae, the ____ rests and pivots on C2.
5. This type of volume is the amount of air remaining in the lungs after a forced exhalation.
9. The lower respiratory tract consists of the trachea, primary bronchi, and this.
10. This leads to the digestive system and opens for food.
11. This is composed of fused coccygeal vertebrae.
13. This substance is secreted inside the Type II pneumocyte that reduces surface tension and gives lubrication.
15. This is also known as the "windpipe."
16. This is also known as the collar bone.
20. Air molecules will flow from areas of high concentration to areas of low concentration to maintain _______.
21. The vertebral column consists of these many sacral vertebrae.
22. Conducting airways grow in diameter and length until the _____ reaches its adult size.
24. This is the subdivision of the total amount of air the lungs can contain.