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If a plastic liner is not available, trash cans are kept clean by 

   Refer to the image above. 1. Name the cell type at the end of “A.”[a] 2. Name its function.[b]

Name the structure that keeps the trachea patent.

Refer to the image above.  Which of the following is true of the cells in the thymus (indicated by the white arrowheads)?

   Refer to the image above.  Which letter refers to the pulmonary capillaries?

Adenoids are associated with which of the following?

Asthma induced muscular spasms affect which of the following structures?

   Refer to the image above.  Which letter refers to the respiratory bronchiole?

   Refer to the image above. 1. Name the special feature at the end of “B.”[a] 2. Name the location of the structure at the end of “A.” (be specific).[b]

______________ are made in cholangiocytes and are secreted into the canaliculi.