The genetic sex is determined by whether a Y bearing or next bearing sperm fertilizes the open; the presence or absence of a Y chromosome in turn determines whether the gonads of the embryo will be testes or ovaries; and the presence or absence of testes, finally, determines whether the man and woman joint sexual organ accessory organs and external genitalia will be male or female. Fibrous joint Cartilaginous joint Synovial joint. Hidden categories: This page was last edited on 12 Marchat It begins with a single fertilized egg and culminates 38 weeks later with birth of a male child.
Male reproductive system
The arteries of the penis are dilated while the veins are compressed so that man and woman joint sexual organ flows into the erectile cartilage under pressure. Male reproductive system. This occurs when one X chromosome contains a segment of the Y chromosome, which was inserted into the X chromosome of the father's sperm. Sexual identity is determined at fertilization when the genetic sex of the zygote has been initialized by a sperm cell containing either an X or Y chromosome.
If this sperm cell contains an X chromosome it will coincide with the X chromosome of the ovum and a female child will develop. Retrieved from " https: It holds and protects the testicles. The vas deferens, also known as the sperm duct, is a thin tube approximately 30 centimetres 0. When the male becomes sexually arousedthe penis becomes erect and ready for sexual activity.
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