Prática de Shadowing: Fertilization - Aprenda a falar inglês com vídeo
Criando lição...
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.
📺 Mesmo canal
✨ Vídeo recomendado
C14
44 frases
Mosquito Life Cycle and Disease Prevention
IELTS PrepTOEFL PrepUniversity Students
C11
135 frases
The Most Overlooked Qur'anic Verse About Human Origins!
IELTS PrepTOEFL PrepUniversity Students
B21
7 frases
Oxytocin: The Love Hormone (#short)
University StudentsWorking Adults
B21
55 frases
Hope for the White Rhino: Scientists Create 38 Embryos in Conservation Breakthrough | 4K | N18G
IELTS PrepTOEFL PrepUniversity Students
C114
12 frases
Let’s Tie All Planets Together
University StudentsWorking Adults
C11
20 frases
Ferns Grew Up. Why Couldn’t They Move On?
TOEFL PrepCambridge Exam PrepUniversity Students
C13
52 frases
Human Anatomy Eye
IELTS PrepTOEFL PrepUniversity Students
C157
10 frases
Why Women Over 30 Should Consider Freezing Their Eggs
University StudentsWorking Adults
C11
239 frases
4 How to use PCR and qPCR
Business EnglishUniversity StudentsWorking Adults
B21
197 frases
tagesschau 20:00 Uhr, 21.07.2026
Daily ConversationUniversity StudentsWorking Adults
B22
43 frases
What If You Were Swallowed ALIVE by a 60-Foot Sperm Whale?
Daily ConversationUniversity StudentsWorking Adults
Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível C1 usa o vídeo “Fertilization”. As palavras que mais se repetem: sperm, egg, inside, membrane, toward. Este vídeo tem 46 frases e 662 palavras para praticar shadowing. A fala dura 5:23. O falante mantém um ritmo estável de cerca de 123 palavras por minuto, confortável para o shadowing. Apenas 67% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
As 15 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| membrane substantivo | /ˈmɛm.bɹeɪn/ | membrana |
| cervix substantivo | /ˈsɝ.vɪks/ | cérvice, cérvix |
| attach verbo | /əˈtæt͡ʃ/ | anexar |
| chromosome substantivo | /ˈkɹoʊməˌsoʊm/ | cromossoma, cromossomo |
| cilium substantivo | /ˈsɪl.i.əm/ | cílio |
| fertilization substantivo | fertilização | |
| mucus substantivo | /ˈmjuːkəs/ | muco, ranho |
| zygote substantivo | /ˈzaɪˌɡoʊt/ | zigoto |
| vagina substantivo | /vəˈdʒaɪ.nə/ | vagina |
| acidic adjetivo | /əˈsɪd.ɪk/ | ácido |
| acrosome substantivo | acrossomo | |
| awaken verbo | /əˈweɪkən/ | acordar, despertar |
| burrow substantivo | /ˈbʌɹoʊ/ | túnel, toca |
| contraction substantivo | /kənˈtɹækʃ(ə)n/ | contração |
| digestive adjetivo | /daɪˈdʒɛstɪv/ | digestivo |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| spread out verbo | espalhar-se |
Pronúncia para ficar de olho
- Os sons de “sh” e “zh”: contraction /kənˈtɹækʃ(ə)n/, specialize /ˈspɛʃəˌlaɪz/, fusion /ˈfjuː.ʒən/
- Palavras longas — acerte a sílaba tônica: hyperactive /ˌhaɪpəɹˈæk.tɪv/, impenetrable /ɪmˈpɛnətɹəbəl/, reproductive /ˌɹiːpɹəˈdʌktɪv/, characteristic /ˌkæɹ(ə)ktəˈɹɪstɪk/, consistency /kənˈsɪs.tən.si/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: zygote /ˈzaɪˌɡoʊt/, acidic /əˈsɪd.ɪk/, implant /ɪmˈplɑːnt/, ovulate /ˈɒvjʊleɪt/, spiderweb /ˈspaɪ̯dɚwɛb/
- /h/ — um sopro suave, diferente do “r”: hyperactive /ˌhaɪpəɹˈæk.tɪv/, harden /ˈhɑɹdn̩/
- s + consoante no início — sem um “i” antes: specialize /ˈspɛʃəˌlaɪz/, spiderweb /ˈspaɪ̯dɚwɛb/, sweep /swiːp/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Faça shadowing frase por frase na velocidade normal, repetindo cada uma até o seu ritmo ficar igual ao do falante.
- Grave a sua voz e compare com o original, prestando atenção a palavras como membrane, cervix, attach.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.