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The penis is the male external excretory and sex organ. The penis contains the external opening of the urethra, which is used for urination and to deliver semen into the vagina of a female sexual partner. Erectile tissue inside the penis allows the penis to increase in size and become rigid during sexual stimulation.
When a child's gender is not clear at birth, the child has atypical genitalia ambiguous genitalia. This means that the genitals don't seem to be clearly male or female. You have 46 chromosomes in each cell of your body.
Humans are sexual, meaning that both a male and a female are needed to reproduce. Each is equipped with specific organs capable of producing specific cells needed to procreate. The average age of puberty for males is around
Penisthe copulatory organ of the male of higher vertebrates that in mammals usually also provides the channel by which urine leaves the body. The corresponding structure in lower invertebrates is often called the cirrus. The human penis is anatomically divided into two continuous areas—the body, or external portion, and the root.
The male reproductive system includes external penis, scrotum, epididymus, and testes and internal accessory organs. These external structures are the penis, scrotum, epididymis, and testes. Male Reproductive System : Lateral view of male reproductive system with organs labeled.
Click image to enlarge. The bag of skin that holds and helps to protect the testicles. The testicles make sperm.
In biological terms sexual reproduction involves the union of gametes - the sperm and the ovum - produced by two parents. Each gamete is formed by meiosis see Chapter 3. This means each contains only half the chromosomes of the body cells haploid.
Jennifer L. The genital region of females is located medially on the sixth thoracic sternite. It consists of a pair of gonopores connected by a medial genital slit, which leads to a cuticlar sperm storage organ that is shed with every molt.
We have shown previously that deficient androgen action within a masculinization programming window MPW; e To further investigate importance of the MPW, we used two rat models, in which foetal androgen production or action was impaired during the MPW by exposing in utero to either di n-butyl phthalate DBP or to flutamide. Offspring were evaluated in early puberty Pnd25 to establish if reproductive organ size was altered. The testes, penis, ventral prostate VP and seminal vesicles SV were weighed and penis length measured.