Date of Award

5-1943

Degree Type

Bachelors Essay

Degree Name

Bachelor of Science (BS)

Department

Biological Sciences

First Advisor

James C. Perry

Second Advisor

Donald J. Keegan

Abstract

The testes is a pair of oval organs posterior to the lungs and anterior to the kidneys. Each testes is attached by a mesentery to the anterior end of the kidney. An adrenal gland is located at the anterior portion of each testes. The vasa deferentia are slender convoluted tubules. Each arises from the median edge of the testes passes cauded along the ventral surface of the kidney, paralleling the ureter and enlarging slightly at the distal end to form a small seminal vesicle, which enters the urogenital region of the cloaca by a papilla. The male urodaeum is smaller and receives the two deferent ducts instead of the oviducts. A copulatory organ is lacking. The male and female copulate by cloacal contact. The kidneys are metanephroi. Each is a flattened three-lobed organ situated against the dorsal wall. The ureter, or metanephric duct is located just dorsal to the renal portal veins. The ureter begins at the groove between the anterior and middle lobes of the kidney and extends into the cloaca, into the urodeum.

Comments

A Thesis submitted to the faculty of the College of Liberal Arts of Marquette University in Partial Fulfillment of the Requirements for the Degree of Bachelor of Science, Milwaukee, Wisconsin

Download

Share

COinS