. P'k;. 28. — Cross section of two of the small air tubes of the lung of a goose. On the right the air passages are filled with black injection mass. On the left the arteries are similarly injected. (From Oppel, after Schulze.) transferred from one part of the respiratory system to another, since the passages and also the lining membranes are contin- uous from the nostrils to the air sacs. There are also diseases of the vascular part of the lungs. Some of these diseases are caused by unfavorable conditions as exposure to cold, drafts of air, or moist air or to improper food. Others are due to
. P'k;. 28. — Cross section of two of the small air tubes of the lung of a goose. On the right the air passages are filled with black injection mass. On the left the arteries are similarly injected. (From Oppel, after Schulze.) transferred from one part of the respiratory system to another, since the passages and also the lining membranes are contin- uous from the nostrils to the air sacs. There are also diseases of the vascular part of the lungs. Some of these diseases are caused by unfavorable conditions as exposure to cold, drafts of air, or moist air or to improper food. Others are due to specific organisms. Most of the latter are con- tagious. Exposure to unfavorable conditions also reduces the abilitv of the birds to resist infectious diseases.
Size: 2719px × 1838px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectpoultry, bookyear1915
