Identify the structure marked with the  number 9.

Identify this thinnest type of epithelial tissue.  It is found in the air sacs of the lungs.

Identify the structure indicated by # 6   

Identify the structure marked with the  number 37.

Identify this type of epithelial tissue which lines the trachea.    

Identify the structure marked with the red number 3.  

Identify this thinnest type of epithelial tissue.  It is found in the air sacs of the lungs.

Identify the structure marked with the  number 5.

Identify the cavity indicated by # 6 

Identify the structure marked with the  number 37.