Presentation on theme: "The Male Reproductive System"— Presentation transcript:
1The Male Reproductive System Chapter 18The Male Reproductive System
2DO NOW 10-9Draw and label your version of the female reproductive system (should include ALL 8 parts) and give 4 definitions out of 8 of those parts.REMEMBE THIS DOESN’T HAVE TO BE THE BEST DRAWING…JUST SOMETHING THAT YOU UNDERSTAND.
3DO NOW 10-10In what ways are the male and female reproductive systems different? In what way are they the same? (do not just list organs as differences…think bigger EX: the male and female reproductive systems are similar because they are both involved in reproduction)
4DO NOW 10-11Make a venn diagram of the male and female reproductive system. What are their differences and similarities.
5KEY TERMS Sperm Fertilization Testis Penis Semen The sex cell that is produced by the testes and that is needed to fertilize an eggFertilizationThe process by which a sperm and an egg and their genetic material join to create a new human lifeTestisThe male reproductive organ that makes sperm and testosteronePenisThe male reproductive organ that removes urine from the body and that can deliver sperm to the female reproductive systemSemenA fluid made up of sperm and other secretions from the male reproductive organs
6What the Male Reproductive System Does The male reproductive system works to produce sperm and deliver it to the female reproductive system.Sperm are sex cells that are produced by the testes and are needed to fertilize an egg.
7Sperm Sperm consists of three regions: Head – tip contains enzymes that helps to dissolve the protective layer around the egg so fertilization can occur. The 23 chromosomes are located here.Body – is packed with mitochondria, supplies the energy for the sperm to swim to the egg.Tail – is a single, powerful flagellum that propels the sperm
8How the Male Reproductive System Works The male reproductive system is made up of internal and external organs
9TermsThe testes (testicles) are the male reproductive organs that produce sperm and testosterone.Produce several hundred million sperm each day.Sperm are made inside the testes in tightly coiled tubules called seminiferous tubules.Testosterone is the major male sex hormone. It regulates body changes during puberty and influences sperm production. During puberty testosterone causes what changes for male?Facial and body hair, voice deepens, shoulders broaden.
10Terms Penis Epididymis Vas Deferns Seminal Vesicle Prostate Gland male reproductive organ that removes urine from the body and can deliver sperm to the female reproductive system.EpididymisSperm are stored and matured in this. The epididymis is made up of tightly packed coils tubes.Vas Defernsa duct that extends from the epididymis. It contracts to help move sperm along as they exit the body. It eventually merges with the urethra.Seminal VesicleThey are found near the base of the bladder. They produce thick secretions that nourish the sperm and help sperm move easier.Prostate GlandEncircles the urethra near the bladder. The gland secretes a thin, milky fluid that protects the sperm from acid in the female reproductive system.Bulbourethral (Cowper’s) GlandFound near the urethra below the prostate. Prior to ejaculation, this gland secretes a clear fluid that protects the sperm from acid in the male urethra
11Structures of the Male Reproductive System Reproductive Organs• Testes• Epididymis• Vas deferens• Penis• UrethraAccessory Glands• Seminal vesicles• Prostate Gland• Bulbourethral (Cowper’s) gland
12External Features of the Male Reproductive System
13Male Reproductive Health CircumcisionIs the surgical removal of the foreskin from the penisNOT EVERYONE GETS THIS DONESmegma – is a substance that forms under the foreskin consisting of dead skin and other secretionsDigital Rectal ExaminationProstate cancer is the second most common cancer in malesDRE – is an examination in which the physician inserts a finder into the rectum and examines the internal reproductive organs and the rectum for irregularities.Testicular Self Examination – a self test in which the male checks his testes for lumps and tenderness. (pg. 435)
14How the Male Reproductive System Works The penis is the male reproductive organ that removes urine from the body and can deliver sperm to the female reproductive system.Consists of soft tissue and blood vessels.The penis must be erect during ejaculation (blood vessels in the penis fill with blood during sexual activity).Ejaculation – is when sperm leave through the penis during sexual excitement.Urine or sperm passes through the penis in the urethra.Sperm from the testes travel through the epididymis and the vas deferens. In the vas deferens, sperm mixed with fluids to make semen.
15Sperm Production and Travel Path Sperm produced in seminiferous tubules of testesThe sperm then move through a maze of tiny ducts intothe epididymis where they matureThe sperm eventually drain into the vas deferens thattravels up through the scrotum inside the spermatic cordThe vas deferens continues upward to the bladder whereit is joined by the excretory duct of the seminal vesicle,forming the ejaculatory ductEjaculatory duct joins with urethra within the prostateUrethra extends to the tip of penis
20Early Detection of Testicular Cancer What age group is affected by testicular cancer the most?When is a man most at risk?Can testicular cancer be treated effectively?When?How often should you perform a testicular self examination?How do you perform a testicular self examination?