Sperm: Sperm are the reproductive cells of males (humans and other mammals). Sperm is produced in the testes and are ejaculated from the body during sexual intercourse. Answer and Explanation:1 The spermatic cord is a network of vessels, ducts, and nerves that are surrounded by connective tis...
The organs differ between males and females. In the male, the main ones are the testes, prostate and penis, while in the female, the main organs are the ovaries, uterus and vagina. The ovaries produce eggs that are fertilized by male sperm, produced in the testes. The embryo then ...
Male fly ejaculate is composed of sperm, produced in the testes, as well as seminal fluid, which is secreted by the accessory gland and other tissues of the repro- ductive tract12 (Fig. 3b). Both XO 41 and son of tudor42 males, which lack sperm, but not seminal fluid, elicited ...
The hormones produced by the gonads are not only important for the production of gametes but also for functions in target tissue distant from the gonads, e.g. the induction of reproductive and other behavior in the brain. In the testes, sperm-producing Sertoli cells and testosterone-producing ...
Semencontains sperm, which is made in thetestes. It also contains a nutrient-rich fluid (seminal fluid) that helps sperm move. Semen exits the body through the urethra. Precumis made in theCowper’s glands, pea-sized glands located inside of the body behind the penis and connected to the...
After controlling for male size, investment in sperm production decreases significantly according to the sequence obligatory multiple queen mating > multiple–single queen mating > single–double queen mating. Furthermore, the number of spermatozoa produced per male decreases significantly with reduction in...
Step-by-Step Solution for the Question on Spermatogenesis:1. Definition of Spermatogenesis: - Spermatogenesis is the biological process through which sperm cells (spermatozoa) are produced from precursor ger
such as to treat, a condition that causes decreased sperm or testosterone production in the testes; it also is used to increase muscle-mass for patients suffering fromHIVwasting syndrome. The drug is used to treat breast cancer as well because it helps reduce the growth of breast cancer cells...
We find that mouse MEIOB has evolved to fulfill an essential function in meiosis. cells14, and from XXY* testes, which lack all germ cells and thus contain only somatic cells15. By subtracting these two data sets from the P18 data set, with a stringent cutoff value of at least 3 ...
Similarly, sperm length is strongly influenced by X-linked genes in dung flies (Ward, 2000) and crickets (Morrow and Gage, 2001) although not in Drosophila mojavensis (Miller et al., 2003) or in hybrids produced from a cross between Drosophila simulans and Drosophila sechellia (Joly et al....