Patterns of reproductive ontogeny in four species coral reef wrasses (F: Labridae) Hemigymnus melapterus, fasciatus, Cheilinus fasciatus and Oxycheilinus digramma were investigated. Populations each sampled from two island groups the central Great Barrier Reef (GBR), Australia, reefs Philippines. These three sampling locations span 30° latitude. The GBR Philippine experience biologically signif...

HISTOLOGY. Roy 0. Greep, Ed. New York, Blakiston, 1954. 953 pp., 648 figs., $15.00. This massive textbook of histology marks a new departure from the usual text. It began as a sixth edition of the text by Bremer and Weatherford and ended as a completely new book, both as to text and as to most of the illustrations. In addition, the chapters have been written by thirteen different contributors, ...

Background: Celery (Apium graveolens) has many therapeutic effects.This plant has many phytoestrogens that can affect on the reproductive endocrine system and can reduce fertility .In this study, hydro alcoholic extracts of celery leaves on the pituitary-gonad axis in young male l mice of Balb/C was investigated. Materials and Methods: The samples were randomly divided into 5 groups (three trea...

The direction of gonadal development is established through the predominance of one of two sex-determining pathways in bipotential gonads. When Sry is expressed, the male pathway prevails and a series of prominent changes in morphology and function of the gonad lead to testis differentiation. In the absence of Sry, the female pathway gains control of gonadal development, resulting in a lack of ...

The aim of the present study was to evaluate sex differences in tumorigenesis by assessing the number of Ki-67-positive cells [Ki-67(+)] in urethane-induced mice lung tumors and the effect of sodium valproate (NaVP) in BALB/c mice. Gonad-intact and gonadectomized female and male mice were divided into the following groups: i) Treated with urethane, ii) treated with urethane and NaVP and iii) go...

Sex determination of the gonad is an extraordinary process by which a single organ anlage is directed to form one of two different structures, a testis or an ovary. Morphogenesis of these two organs utilizes many common cellular events; differences in the timing and execution of these events must combine to generate sexually dimorphic structures. In this chapter, we review recent research on th...