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The respiratory system
Member rating: No Rating | Words: | Submitted: Wed Aug 27 2003
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The respiratory system 1. Define respiration. Respiration is the process of converting glucose to energy, which goes to every cell in the body. 2. Describe the organs of external respiration. The nose is divided into the right and left cavities and is lined with tiny hairs and mucous membrane, which secretes a sticky fluid, called mucus, which helps prevent dust and bacteria from entering the lungs. The nose moistens, warms and filters the air and is an organ, which senses smell. The naso-pharynx is the upper part of the nasal cavity behind the nose, and is lined with mucous membrane. The naso-pharynx continues to filter, warm and moisten the incoming air. The pharynx is a large cavity behind the mouth and between the nasal cavity and larynx. The pharynx serves, as an air and food passage but cannot be used for both purposes at the same time, otherwise choking would result. The air is...
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