Life Sciences Commons^™

A Study Of The Respiratory System Of The Sparrow (Passer Domesticus), Ben Peter Arnowitz

Bachelors’ Theses

The respiratory mechanisms of birds, unlike that of mammals, are definitely adapted to the function of flight. Because of this added adaptation, we should expect, therefore, some morphological and perhaps even embryological, physiological, and histological differences. An example of a morphological difference between birds and mammals is the intricate system of air-sacs that are present in birds. This remarkable feature is probably the reason why birds are able to fly as they do.

In this thesis the writer has used the sparrow (Passer domesticus) for the basis of his experiments. This particular bird was chosen in preference to …

A Study Of Sex Differentiation In Lebistes Reticulatus As Affected By Estradiol Stilbestrol And Pregneninolon., Esther Coogle

Electronic Theses and Dissertations

No abstract provided.

The Life History Of Cyclocoelum Microcotyleum, George Alfred Butler

University of the Pacific Theses and Dissertations

Monostome trematodes of the family cyclocoelidae, taken from the American coot, Fulica americana, were described as a new species, Cyclocoelum microcotyleum, by Noble in 1933. These flukes were found in the air-spaces or the coelomes of birds taken from the waterways near Stockton, California.

Before this present work various attempts had been made to determine the lite history of this fluke. A number of fresh-water snails, indigenous to the region in which the definitive host was found, were exposed to miracidia of this fluke, but observations or infection were not obtained. In the winter of 1940-41 specimens of …