Reproduktivni sistem - Muški organi
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Questions and Answers

Sjemenka sadrži ______ iz koje se može razviti nova biljka.

klicu

Oprašivanje golosjemenjača obavlja ______.

vjetar

Višestanične gljive se uglavnom razmnožavaju nespolno ______.

sporama

Muški spolni organi uključuju mošnju i ______.

<p>penis</p> Signup and view all the answers

U maternici se razvija ______ ako dođe do oplodnje.

<p>plod</p> Signup and view all the answers

Ženski spolni hormoni uključuju estrogen i ______.

<p>progesteron</p> Signup and view all the answers

Molekula ______ je osnova nasljeđivanja.

<p>DNA</p> Signup and view all the answers

Muški spolni organi sadrže ______ koji proizvode spermije.

<p>sjemenike</p> Signup and view all the answers

Rodnica je cijev koja povezuje maternicu sa vanjskim ______ organima.

<p>spolnim</p> Signup and view all the answers

U procesu dijeljenja stanica, molekula DNA se ______.

<p>replikuje</p> Signup and view all the answers

Geni su manji dijelovi molekule ______ koji određuju nasljedne osobine.

<p>DNA</p> Signup and view all the answers

Svaka novonastala molekula DNA se sastoji od jednog ______ lanca i jednog novog lanca.

<p>roditeljskog</p> Signup and view all the answers

Mitoza je proces dijeljenja kojim nastaju ______ stanice.

<p>tjelesne</p> Signup and view all the answers

Kod čovjeka, svaka nova stanica nakon diobe ima 2n = ______ kromosoma.

<p>46</p> Signup and view all the answers

Mejoza se odvija u ______ žlijezdama.

<p>spolnim</p> Signup and view all the answers

Oplodnjom nastaje oplođena jajna stanica ( __________ ).

<p>zigota</p> Signup and view all the answers

Nakon mejoze nastaju ______ spolne stanice koje imaju n kromosoma.

<p>4</p> Signup and view all the answers

Oplodnja je proces stapanja jezgara spermija i ______ stanice.

<p>jajne</p> Signup and view all the answers

Oplodena jajna stanica ima __________ kromosoma.

<p>46</p> Signup and view all the answers

Iz oplođene jajne stanice se razvija __________ koji jajovodom putuje prema maternici.

<p>zametak</p> Signup and view all the answers

Svaka stanica spolne žlijezde ima 2n ______ kromosoma.

<p>kromosoma</p> Signup and view all the answers

Mužjak u procesu oplodnje unosi ______ u rodnicu žene.

<p>spermiju</p> Signup and view all the answers

Iz zametka se mitozama razvija __________.

<p>plod</p> Signup and view all the answers

Iz jedne oplođene jajne stanice nastaju __________ blizanci.

<p>jednojajčani</p> Signup and view all the answers

Dok se __________ jaja odvija prenos osobina roditelja na potomke.

<p>nasljeđivanje</p> Signup and view all the answers

Spolni kromosomi su X i __________.

<p>Y</p> Signup and view all the answers

Spolna __________ je suzdržavanje od spolnih odnosa.

<p>apstinencija</p> Signup and view all the answers

Rakovi imaju vanjsku ______ jer žive u vodi.

<p>oplodnju</p> Signup and view all the answers

Gujavica je kolutićavac koji ima parne jajnike i ______, pa je zbog toga dvospolac.

<p>sjemenike</p> Signup and view all the answers

Kralježnjaci se razmnožavaju ______.

<p>spolno</p> Signup and view all the answers

Mekušci imaju različite vrste oplodnje koje ovise o ______.

<p>staništu</p> Signup and view all the answers

Pri razmnožavanju žarnjaka i spužvi, pupanje je ______ razmnožavanje.

<p>nespolno</p> Signup and view all the answers

Unutarnja oplodnja se odvija u ______ ženke.

<p>jajovodu</p> Signup and view all the answers

Jednostanični organizmi se razmnožavaju staničnom ______.

<p>diobom</p> Signup and view all the answers

Vodozemci imaju ______ oplodnju koja se odvija u vodi.

<p>vanjsku</p> Signup and view all the answers

Ženke ptica imaju jedan ______ i jedan jajovod.

<p>jajnik</p> Signup and view all the answers

Cvijet služi za ______ razmnožavanje biljke.

<p>spolno</p> Signup and view all the answers

Beskralježnjaci mogu biti razdvojenog spola ili ______.

<p>dvospolci</p> Signup and view all the answers

Muški cvjetovi imaju samo ______.

<p>prašnike</p> Signup and view all the answers

U kritosjemenjača se oplodnja odvija u plodnici ______.

<p>tučka</p> Signup and view all the answers

Kod nekih vrsta kukaca, poput ______, iz oplođenog jaja se prvo razvija ličinka.

<p>leptira</p> Signup and view all the answers

Mladi gmaz kljunom probija ______ kada završi razvoj u jajetu.

<p>ljusku</p> Signup and view all the answers

Preobrazba je postupni razvoj punoglavca u ______.

<p>odraslu žabu</p> Signup and view all the answers

Study Notes

Reproductive System

  • The reproductive system is composed of internal and external organs
  • Internal organs are located in the lower abdominal cavity, protected by the pelvic bones
  • External organs are outside the pelvis and visible on the body

Male Reproductive Organs

  • External Organs:

    • Scrotum (testicles): A sac-like skin structure containing the testicles.
    • Testes: Produce sperm; the scrotum regulates temperature for optimal sperm production; it contracts and relaxes to maintain a lower temperature than the body's core temperature if the environment is cool or warm.
    • Penis: Contains spongy tissue with blood vessels that engorge during sexual arousal, causing an erection. The penis contains the urethra, a passage for both urine and semen. Ejaculation is the release of sperm through the urethra.
  • Internal Organs:

    • Two testes
    • Two epididymides: Where sperm mature
    • Two vas deferens: Connect the epididymis to the ejaculatory duct
    • Prostate and seminal vesicles: Produce fluids that nourish and protect sperm.

Female Reproductive Organs

  • External Organs:
    • Vulva: Includes the labia majora and minora, clitoris, and vaginal opening. The labia protect the internal structures.
    • Function: Protect internal parts
  • Internal Organs:
    • Two ovaries: Produce and release eggs (ova)
    • Two fallopian tubes: Transport eggs from the ovaries to the uterus
    • Uterus: Houses the developing embryo/fetus; it's a muscular organ that thickens its lining during the menstrual cycle in preparation for a possible pregnancy.
    • Vagina: The birth canal; this muscular tube connects the uterus to the external genitals.

Molecular DNA

  • DNA is the blueprint for each cell
  • It's a universal molecule

Menstrual Cycle

  • The menstrual cycle is the regular changes that occur in the female reproductive system that prepares the body for pregnancy if the egg isn't fertilized.
  • Menstruation is the shedding of the uterine lining if an egg is not fertilized.

Reproduction in Animals

  • Internal Fertilization: Involves the union of sperm and egg inside the female body. A variety of animals utilize this method
  • External Fertilization: Happens outside the body, in water. Fish, amphibians, some invertebrates utilize this method.

Types of Reproduction

  • Asexual Reproduction: A single organism creates a genetically identical copy of itself.
  • Sexual Reproduction: Two parents contribute genetic material to create a unique offspring.

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Description

Ovaj kviz pokriva osnovne informacije o muškim reproduktivnim organima, uključujući unutrašnje i spoljašnje strukture. Istražujemo funkciju skrotuma, testisa i penisa, kao i značaj temperature za proizvodnju spermatozoida. Ovaj kviz će vam pomoći da bolje razumijete muški reproduktivni sistem.

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