3rd qrtr

• the primary function of sex is to contribute gametes and the primary sex characters are the gonad. Testes in male and ovaries in females
• fertilisation is internal and foetus develops inside the uterus of the mother (viviparous)
• female reproductive system is extremely modified to enable internal fertilization and maintenance of pregnancy
• the male reproductive system is located in the pelvis region.
• (male reproductive system)... It includes a pair of testes along with the accessory duct glands and the external genitalia
• sperms formation continues even in old men, but formation of ovary ceases in volume around the age of fifty years.
• in adults, each testes oval in shape, with a length of about 4-5cm and a width about 2-3cm.
• the testes is covered by a dense covering, each testes has about 250 compartments called testicular tobules.
• sperms are produced in each lobule containing one to three highly coiled somniferous tubules.
• external genital organ in male is penis through which urethra runs. It is an erectile organ and helps in sperm deposition in the vagina during copulation
• the male reproductive system performs the following

  1. secretion of the male sex hormones
  2. production of the sperm cells
  3. transfer of sperm cells
• cells -> tissues -> organs -> systems->
• the reproductive system in men has components in the abdomen, pelvis, and, perineum.
• the scrotum is an outpouching of the lower part of the anterior abdominal wall.
• it contains the testes, the epididymis, and the lower end of the spermatic cords

  SCROTUMMMMMMMMMM bech
• the scrotum consists of- 


  skin
• in cold temperatures, the scrotum becomes firm and wrinkled, reducing the overall size of the scrotum.
• the testes are responsible for making sperm.
• testes are also involved in producing a hormone called testosterone.
• testosterone is an important hormone during male development and maturation for developing, deepening the voice, and growing body hair. epididymis.
• the main function of the epididymis is to store the sperms for maturation and transport it to the vas deferens.
• epididymis is a tightly coiled series of thread-like tubules that form a comma-shaped structure on the poster side of the testis. The Sperms cells continue to mature along this tube.
• the vas deferens is a long, muscular tube that travels from the epididymis into the pelvis cavity.
• the vas deferense transports mature sperms to the urethra in preparation for ejaculation.
• the vas deferens is a long muscular tube traveling from the epididymis where the sperm moves to this tube up to the ampulla of the ductus deferens .
• the vas deferens emerges from the epididymis and ascends along the prosterior side of the testes to become associated with the blood vessels and nerve that supply the testes.
• the ejaculatory duct connects into the prostrate glad and ends with by joining the urethra within the prostrate gland.
• overall the function of the male urethra is to allow passage of urine and semen.
• the urethra is a pathways for both urine and male reproductive fluids, but these do not exit the urethra at the same time. thus, there is no mixing.
• the male urethra connects from the urinary bladder to the penis. while seminal fluids passes through the urethra, a reflex causes the urinary sphincter muscle to contract tightly to keep urine from passing the urinary bladder through the urethra.
• the two main function of the penis include sexual intercourse and micturiton (urination).
• when a person experiences arousal, the penis fills with bloodc causing an erection. As such, erectile function is closely related to cardiovascular health.
• the penis is only an accessory organ for reproduction and not the reproductive organ itself as most people think of.
• (the penis) It is the organ for copulation, and it functions in the transfer of sperm cells from the male to the vagina of the female.
• the engorgement of the erectile tissues with blood causes the penis to enlarge and become firm in a process called erection.
• produces sperm cells


  testes/testis
• a sac that holds the testes/testis

  scrotum
• places sperm into the vagina during mating

  penis
• carries sperm from the testes to the urethra

  vas deferens
• carries sperm out of the body

  urethra