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How do noses work? Objects give off tiny amounts of tiny molecules into the air. When just a few of these molecules get up your nose, they dissolve in the mucus up there. Some molecules come into contact with special receptors on what’s called your “olfactory membranes.” Each nostril has a membrane, and each membrane is only about the size of a postage stamp. The membranes hold millions of receptor cells, each of which are ready to send messages to the brain about the molecules that go up your nose.
Дата первого эфира : Sep 10, 1993
Дата последнего выхода в эфир : Jun 20, 1998
Эпизод : 100 Эпизод
Сезон : 5 Сезон
Время выполнения: 26 минут
Студия: PBS
Страна: United States of America