In this article we will discuss about the circulatory system of rattus norvegicus. Two distinct circulatory fluids, namely blood and lymph, circulate through the circulatory system of the body. Blood flows through well-defined blood vessels and is pumped by an organ called heart. The lymph flows through lymph vessels and intercellular spaces. Several contractile lymph hearts force the flow of [...]
In this article we will discuss about the male and female reproductive organs of Rattus Norvegicus. (A) Male Reproductive Organs: The male reproductive organs (Fig. 1.156) are Testes, Epididymis, Deferent ducts, Spermatic cords, Urethra, Penis, Accessory genital glands, Perineal glandular modifications and Caudal glands. (i) Testis: In the young males the testes remain inside the abdomen. In adults, the testes [...]
In this article we will discuss about the external features of rattus norvegicus. The body can be divided into head, short neck and trunk (Fig. 1.131). The whole body of Rattus Norvegicus is covered by gray hairs. The head is produced anteriorly into a blunt shout, which ends into a terminal mouth. The upper lip has a vertical slit. The [...]