It has been reported that lower levels of concentration of sulphur dioxide cause temporary spasm of the smooth muscles of the bronchia . यह पता चला है कि सल्फर डाईआक्साइड की कम मात्रा श्वसनी की मृदु पेशियों ( स्मूथ मसल्स ) में अस्थाई मरोड पैदा कर देती हैं .
परिभाषा
muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets
a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart) पर्याय: involuntary muscle,
मोबाइल