1 / 25

Reproduction

Reproduction. The process of producing offspring which is a characteristic of life. Male Reproductive Organs. Scrotum: Contains testes Located behind the base of the penis Produces sperm Epididymis : Coiled tube within the scrotum Place in which sperm complete their maturation

gabriel-russell
Télécharger la présentation

Reproduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reproduction The process of producing offspring which is a characteristic of life.

  2. Male Reproductive Organs • Scrotum: • Contains testes • Located behind the base of the penis • Produces sperm • Epididymis: • Coiled tube within the scrotum • Place in which sperm complete their maturation • Holding place for mature sperm • Vas Deferens: • Duct that transports sperm from epididymis to exit the body

  3. Label the Following on Your Diagram Scrotum

  4. Male reproductive Organs • Urethra: • Tube inside penis • Transports sperm out of body • Also transports urine • ( muscle at base of bladder that doesn’t allow sperm and urine to mix) • Seminal Vesicles: • Glands at base of bladder • Secrete mucous like fluid to the vas deferens • Fluid is rich in fructose which provides energy for the sperm

  5. Label the Following on Your Diagram

  6. Male Reproductive Organs • Prostate Gland: • Below urinary bladder • Surrounds top portion of urethra • Secretes a thin fluid • Fluid is a base and helps the sperm move • Bulbourethral Glands: • Located beneath the prostate • Secretes clear, sticky fluid • Fluid is a base which helps neutralize the acidic environment of the male urethra and female vagina.

  7. Label the Following on Your Diagram Bulbourethral Gland

  8. Male Gametes • Sperm are the male version of gametes. • Contain ½ the genetic material as original cell • Hapliods! • Three Parts: • Head • Midpiece • Tail

  9. Sperm • Head • Contains a cap that has an enzyme that helps penetrate the egg • Nucleus that contains the genetic material • Midpiece • Contains Mitochondria • Produces energy for the sperm • Tail • Flagellum • Propels Sperm

  10. Head that contains the nucleus Flagella which aids in movement Cap which contains enzymes Midpiece which contains mitochondria

  11. Journey of the Sperm • Sperm are produced when the inner cells of the testes undergo meiosis. • Meiosis produces four haploid cells and all become sperm cells. • It takes about 74 hours for the sperm to become mature. • Males can produce 300 million sperm per day.

  12. Puberty in Males • Time when secondary sex characteristics begin to develop • Sexual maturity is reached • Changes are controlled by sex hormones On Set of Puberty • Glands in brain secrete LSH and LH hormones • Hormones travel to testes • FSH helps produce sperm cells • LH helps produce testosterone

  13. http://health.howstuffworks.com/adam-200126.htm

  14. Female Reproductive Organs • Ovary • Where egg production takes place • Females have two ovaries • 1 on each side • Size and shape of an almond • Oviduct (Fallopian Tubes) • Tube like structure • Transports egg from ovaries to uterus • Open end of oviduct is near ovaries

  15. Label the Followingon Your Diagram

  16. Female Reproductive Organs • Uterus • Place of fetus development • Between bladder and rectum • Normally is the size and shape of inverted pear • Contains endometrium • Thin inner lining • Cervix • Lower end of uterus • Tapers to a narrow opening into the vagina • Vagina • Passageway to the outside of the female body

  17. Label the Followingon Your Diagram

  18. Female Gametes • Eggs are the female sex cells • Haploids! • Production occurs before birth • Cells in ovaries divide until they reach Prophase I • Under go Resting stage • At birth ovaries contain 2 million of these potential eggs (oocytes) • 40 thousand oocytes are found at puberty

  19. Release of an Egg Occurs once a month beginning a puberty Process of Meiosis starts again in several of the Prophase I cells. Each cell completes Meiosis I and begins Meiosis II Due to unequal division of cytoplasm during meiosis II one cell is smaller than the other and disintegrates---Polar Body #1

  20. Release of Egg During Meiosis II one egg ruptures from the ovary to the oviduct If the egg is fertilized it will complete Meiosis II Again, due to unequal division of cytoplasm one cell is small and disintegrates. The fertilized egg then begins dividing to produce a baby! Ovulation: process of egg rupturing from ovary and being passed to oviduct Roughly 400 eggs are ovulated during the reproductive life of a female.

  21. Before Birth Menstrual Cycle After Fertilization Winner!!!

  22. Sperm & Egg Production Cells in Ovaries 2n Polar Bodies n Sperm cell n sperm cell n (egg cell) nSperm Cell 2n Cells from inside testes n Sperm Cell

  23. Puberty in Females • LH and FSH hormones are produced • FSH stimulates the production of follicles • Group of cells that surround the developing egg • FSH also causes the release of Estrogen which is responsible for sex characteristics

  24. Menstral Cycle • Changes that occur in Female reproductive organs when releasing and egg and preparing for receiving egg • Begins at puberty lasts till menopause • Repeats once a month • Three Stages: • Flow Phase • Follicular Phase • Luteal Phase • If egg is not fertilized the uterine lining is shed causing bleeding. • Process starts all over again!

  25. http://health.howstuffworks.com/adam-200017.htm

More Related