Air forced out Dust and microorganisms (a) Broth sterilized by heat (b) Broth cooled slowly (c) Flask tipped

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Use the following diagram to explain how Pasteur’s swan-
necked flasks prevent contamination of sterile broth the flasks.
Describe what happens to the sterile broth (a) after it has been
allowed to cool as in (b). What happens to the broth after the
flask has been tipped enough to let the broth come in contact
with the dust and microorganisms and is tipped back as in (c)?

Air forced out
Dust and
microorganisms
(a) Broth sterilized
by heat
(b) Broth cooled
slowly
(c) Flask tipped
Transcribed Image Text:Air forced out Dust and microorganisms (a) Broth sterilized by heat (b) Broth cooled slowly (c) Flask tipped
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