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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.
Ngày phát sóng đầu tiên : Sep 10, 1993
Ngày phát sóng cuối cùng : Jun 20, 1998
Tập phim : 100 Tập phim
Mùa : 5 Mùa
Thời gian chạy: 26 phút
Studio: PBS
Quốc gia: United States of America
