Shadowing Practice: Fertilization - Learn English Speaking with Video
Les maken...
1
Fertilization is the epic story of a single sperm facing incredible odds to unite with an egg
2
and form a new human life.
3
It is the story of all of us.
4
During sexual intercourse, about 300 million sperm enter the vagina.
5
Soon afterward, millions of them will either flow out of the vagina or die in its acidic environment.
6
However, many survive because of the protective elements provided in the fluid surrounding them.
7
Next, the sperm must pass through the cervix, an opening into the uterus.
8
Usually, it remains tightly closed, but here the cervix is open for a few days while the woman ovulates.
9
The sperm swim through the cervical mucus, which is thinned to a more watery consistency for easier passage.
10
Once inside the cervix, the sperm continue swimming toward the uterus, though millions will die trying to make it through the mucus.
11
Some sperm remain behind, caught in the folds of the cervix, but they may later continue the journey as a backup to the first group.
12
Inside the uterus, muscular uterine contractions assist the sperm on their journey toward the egg.
13
However, resident cells from the woman's immune system, mistaking the sperm for foreign invaders, destroy thousands more.
14
Next, half the sperm head for the empty fallopian tube, while the other half swim toward the the tube containing the unfertilized egg.
15
Now, only a few thousand remain.
16
Inside the fallopian tube, tiny cilia push the egg toward the uterus.
17
To continue, the sperm must surge against this motion to reach the egg.
18
Some sperm get trapped in the cilia and die.
19
During this part of the journey, chemicals in the reproductive tract cause the membranes covering the heads of the sperm to change.
20
As a result, the sperm become hyperactive, swimming harder and faster toward their destination.
21
At long last, the sperm reach the egg.
22
Only a few dozen of the original 300 million sperm remain.
23
The egg is covered with a layer of cells called the corona radiata.
24
The sperm must push through this layer to reach the outer layer of the egg, the zona pellucida.
25
When sperm reach the zona pellucida, they attach to specialized sperm receptors on the surface,
26
which triggers their acrosomes to release digestive enzymes,
27
enabling the sperm to burrow into the layer.
28
Inside the zona pellucida is a narrow fluid-filled space just outside the egg cell membrane.
29
The first sperm to make contact will fertilize the egg.
30
After a perilous journey and against incredible odds, a single sperm attaches to the egg cell membrane.
31
Within a few minutes, their outer membranes fuse and the egg pulls the sperm inside.
32
This event causes changes in the egg membrane that prevent other sperm from attaching to it.
33
Next, the egg releases chemicals that push other sperm away from the egg and create an impenetrable fertilization membrane.
34
As the reaction spreads outward, the zona pellucida hardens, trapping any sperm unlucky enough to be caught inside.
35
Outside the egg, sperm are no longer able to attach to the zona pellucida.
36
Meanwhile, inside the egg, the tightly packed male genetic material spreads out.
37
A new membrane forms around the genetic material, creating the male pronucleus.
38
Inside, the genetic material reforms into 23 chromosomes.
39
The female genetic material, awakened by the fusion of the sperm with the egg, finishes dividing, resulting in the female pronucleus,
40
which also contains 23 chromosomes.
41
As the male and female pronuclei form, spiderweb-like threads, called microtubules, pull them toward each other.
42
The two sets of chromosomes join together, completing the process of fertilization.
43
At this moment, a unique genetic code arises, instantly determining gender, hair color, eye color, and hundreds of other characteristics.
44
This new single cell, the zygote, is the beginning of a new human being.
45
And now the cilia and the fallopian tube gently sweep the zygote toward the uterus, where he or she will implant in the rich uterine lining,
46
growing and maturing for the next nine months until ready for birth.
📺 Zelfde Kanaal
✨ Aanbevolen Video
C14
44 zinnen
Mosquito Life Cycle and Disease Prevention
IELTS PrepTOEFL PrepUniversity Students
C11
135 zinnen
The Most Overlooked Qur'anic Verse About Human Origins!
IELTS PrepTOEFL PrepUniversity Students
B21
7 zinnen
Oxytocin: The Love Hormone (#short)
University StudentsWorking Adults
B21
55 zinnen
Hope for the White Rhino: Scientists Create 38 Embryos in Conservation Breakthrough | 4K | N18G
IELTS PrepTOEFL PrepUniversity Students
C114
12 zinnen
Let’s Tie All Planets Together
University StudentsWorking Adults
C11
20 zinnen
Ferns Grew Up. Why Couldn’t They Move On?
TOEFL PrepCambridge Exam PrepUniversity Students
C13
52 zinnen
Human Anatomy Eye
IELTS PrepTOEFL PrepUniversity Students
C11
239 zinnen
4 How to use PCR and qPCR
Business EnglishUniversity StudentsWorking Adults
B21
197 zinnen
tagesschau 20:00 Uhr, 21.07.2026
Daily ConversationUniversity StudentsWorking Adults
B22
43 zinnen
What If You Were Swallowed ALIVE by a 60-Foot Sperm Whale?
Daily ConversationUniversity StudentsWorking Adults
B21
164 zinnen
Infertility when everyone else is pregnant | Kati Morton
Daily ConversationUniversity StudentsWorking Adults
Woordenschat en spreektips bij deze les
Deze spreekles op niveau C1 is gebaseerd op de video “Fertilization”. Deze woorden komen het vaakst terug: sperm, egg, inside, membrane, toward. Deze video bevat 46 zinnen en 662 woorden om na te spreken. Het gesproken deel duurt 5:23. De spreker praat in een gelijkmatig tempo van ongeveer 123 woorden per minuut, prettig om te shadowen. Slechts 67% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden, dus de woordenschat is pittig.
Belangrijke woorden in deze video
De 15 moeilijkste woorden uit de video, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| membrane zelfstandig naamwoord | /ˈmɛm.bɹeɪn/ | membraan |
| cervix zelfstandig naamwoord | /ˈsɝ.vɪks/ | baarmoederhals, cervix |
| attach werkwoord | /əˈtæt͡ʃ/ | vastmaken |
| chromosome zelfstandig naamwoord | /ˈkɹoʊməˌsoʊm/ | chromosoom |
| mucus zelfstandig naamwoord | /ˈmjuːkəs/ | slijm |
| uterine bijvoeglijk naamwoord | /ˈjutəɹaɪn/ | baarmoeder- |
| zygote zelfstandig naamwoord | /ˈzaɪˌɡoʊt/ | zygote |
| vagina zelfstandig naamwoord | /vəˈdʒaɪ.nə/ | vagina, schede |
| awaken werkwoord | /əˈweɪkən/ | wekken, wakker maken |
| burrow zelfstandig naamwoord | /ˈbʌɹoʊ/ | hol, burcht |
| fertilize werkwoord | /ˈfɜː(ɹ)tɪlaɪz/ | bemesten |
| hyperactive bijvoeglijk naamwoord | /ˌhaɪpəɹˈæk.tɪv/ | hyperactief |
| impenetrable bijvoeglijk naamwoord | /ɪmˈpɛnətɹəbəl/ | ondoordringbaar, onpeilbaar |
| invader zelfstandig naamwoord | /ɪnˈveɪ.də(ɹ)/ | indringer, indringster |
| perilous bijvoeglijk naamwoord | /ˈpɛɹ.ɪ.ləs/ | gevaarlijk |
Uitspraak om op te letten
- De klanken “sh” en “zh”: contraction /kənˈtɹækʃ(ə)n/, specialize /ˈspɛʃəˌlaɪz/, fusion /ˈfjuː.ʒən/
- Lange woorden — let op de klemtoon: hyperactive /ˌhaɪpəɹˈæk.tɪv/, impenetrable /ɪmˈpɛnətɹəbəl/, reproductive /ˌɹiːpɹəˈdʌktɪv/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, consistency /kənˈsɪs.tən.si/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: digestive /daɪˈdʒɛstɪv/, fertilize /ˈfɜː(ɹ)tɪlaɪz/, hyperactive /ˌhaɪpəɹˈæk.tɪv/, specialize /ˈspɛʃəˌlaɪz/, spiderweb /ˈspaɪ̯dɚwɛb/
- /æ/ — opener dan de Nederlandse “e”: attach /əˈtæt͡ʃ/, contraction /kənˈtɹækʃ(ə)n/, hyperactive /ˌhaɪpəɹˈæk.tɪv/, tract /tɹækt/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/
- /w/ — met ronde lippen: awaken /əˈweɪkən/, spiderweb /ˈspaɪ̯dɚwɛb/, watery /ˈwɔtəɹi/, outward /ˈaʊt.wɚd/, sweep /swiːp/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Spreek zin voor zin na op normale snelheid en herhaal elke zin tot je ritme gelijk is aan dat van de spreker.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als membrane, cervix, attach.
Wat is de Shadowing-techniek?
Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.