Match each of the following structures with its correct definition A. The exchange of gases with the respiratory medium
B. Respiratory structures that represent invaginations of the body
C. Extensive system of air tubes in insects
D. Air hole on insect exoskeleton that controls air flow.
E. Small air pocket of mammalian lung
F. The air tubes of the unique respiratory system of insects
1. Breathing

2. Lungs

3. Alveoli

4. Tracheae

5. Tracheal system

6. Spiracles

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

In which state was more than 100 billion tons of coal mined in 2005?

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.