The respiratory system is usually considered to comprise: airways (nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles); an area of gas exchange (alveoli); and the necessary structures to drive and control respiration (ribs, intercostals muscles, diaphragm, pleura and nervous system). ... The alveoli where gas exchange occurs are necessarily in intimate contact with respired air, and have a large surface area to facilitate gas exchange. ... From this point onwards however, they start to develop alveoli where gas exchange can occur and they are known as respiratory bronchioles...

• Word Count: 3614
• Approx Pages: 14
• Grade Level: Undergraduate

They also contain a primitive lung structure in two of their pleopods of which open to the external environment through a simple pore during respiration. ... Earwigs are known to eat arthropods, and therefore are also likely to prey on Slaters. ... They contain a pore opening to the outside which allows exchange of gases directly in and out of the 'lung'. ... The system requires far less energy to maintain than the likes of the internal human respiratory system and other similar gas exchange methods found in mammals. This is necessary as the Slater is unable to build energy reserves...

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• Approx Pages: 40

Thus in hot weather thermals rise, and water condenses and falls as showers; also precipitation increases up mountainsides. ... The degree of seasonality also has a major effect. ... There are two major components of diversity: within-habitat (diversity may vary greatly between two forest types, for example) and between-habitat (this covers diversity for an entire area, thus also dependent on the diversity of habitats present). ... There are similar latitudinal gradients in fresh and salt water, also decreased aquatic diversity with depth and chemical extremes. There is also lowered diversity ...

• Word Count: 12375
• Approx Pages: 50
• Has Bibliography
• Grade Level: Undergraduate