Reproduction Test - 2

The raphe is the visible ridge between the lateral halves of the penis, found on the ventral or underside of the penis, running from the meatus (opening of the urethra) across the scrotum to the perineum (area between scrotum and anus).

Bulbil is a speical multicellular body essentially meant for reproduction. In Agave the floral buds are modified into bulbils. These bulbils get detached, come in contact with the soil and develop into new plants. In Dioscorea the axillary bud develops into a bulbil. This bulbil detaches from the mother plant and grows up into a new independent one.

The developing embryo has two main populations of cells: an inner cell mass and a trophectoderm. The trophectoderm cells lie at the outer surface of the developing embryo and will become the placenta.

The ampulla is the second portion of the fallopian tube. It is an intermediate dilated portion, which curves over the ovary. It is the most common site of mouse and human fertilisation.

As a consequence of stimulation with luteinising hormone the interstitial cells (Leydig) secrete testosterone into the intertubular tissue, where it is absorbed by blood vessels, lymphatics, and the seminiferous tubules.

The tunica vaginalis is the serous covering of the testis. It is a pouch of serous membrane, derived from the processus vaginalis of the peritoneum, which in the fetus preceded the descent of the testis from the abdomen into the scrotum.

A spermatozoon is a motile sperm cell, or moving form of the haploid cell that is the male gamete. A spermatozoon joins an ovum to form a zygote. In mammals, the sex of the offspring is determined by the sperm cell: a spermatozoon bearing a Y chromosome will lead to a male (XY) offspring, while one bearing an X chromosome will lead to a female (XX) offspring.

Antonie Philips van Leeuwenhoek is commonly known as the Father of Microbiology. Sperm cells were first observed by him.

Sertoli cells are activated by follicle-stimulating hormone and has FSH-receptor on its membranes. It is specifically located in the convoluted seminiferous tubules

The internal pudendal arteries serve as the penile blood supply by entering the penis dorsally and running deep into the tissues of the corpora cavernosa. The internal pudendal artery becomes the penile artery.