VI 



FORM AND FUNCTION 



85 



Fig. 25. — Diaphragm of Duck (diagram after Strasser). The sternum has 

 been removed. 

 Abs, abdominal. sack ; it runs back under the viscera and opens into the lung ; 

 sometimes penetrates the pelvis and femur : as, anterior thoracic sack ; axs, axillary 

 sack, a pouch of the interclavicular ; cs, cervical sack ; D, diaphragm ; g, gizzard ; 

 Gi», great pectoral muscle turned back ; h, heart ; 1, intestine ; ics, interclavicular 

 sack, often pn-trates keel ; Lg, lung ; Lg', line to which the lungs reach ; l1 and Lr, 

 left and right lobes of liver ; ps, posterior thoracic sack ; t, trachea. 



