| D009609 |
Nitrous Oxide |
Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream. |
Laughing Gas,Nitrogen Protoxide,Gas, Laughing,Oxide, Nitrous |
|
| D010100 |
Oxygen |
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. |
Dioxygen,Oxygen-16,Oxygen 16 |
|
| D004781 |
Environmental Exposure |
The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals. |
Exposure, Environmental,Environmental Exposures,Exposures, Environmental |
|
| D006801 |
Humans |
Members of the species Homo sapiens. |
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man |
|
| D000766 |
Anesthesia, Dental |
A range of methods used to reduce pain and anxiety during dental procedures. |
Dental Anesthesia |
|
| D000769 |
Anesthesia, Inhalation |
Anesthesia caused by the breathing of anesthetic gases or vapors or by insufflating anesthetic gases or vapors into the respiratory tract. |
Insufflation Anesthesia,Anesthesia, Insufflation,Inhalation Anesthesia |
|
| D012537 |
Scandinavian and Nordic Countries |
NORWAY; SWEDEN; DENMARK; ICELAND; and FINLAND. |
Scandinavia,Nordic Countries |
|