Shadowing Practice: Why do we get Thirsty? | #aumsum #kids #education #science - Learn English Speaking with Video
Creando lección...
1
Um-Sum moved through his football drills one step at a time,
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feeling the grass shift gently beneath his shoes with every turn.
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The afternoon carried a soft heat that grew gradually around him,
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warming his face and arms.
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As he sprinted forward, his breathing grew heavier,
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sending warm air repeatedly across his tongue.
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Sweat gathered along his hairline,
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forming tiny droplets that moved slowly toward his jaw.
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When he paused for a moment to reset his stance,
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he felt a faint dryness settling inside his mouth.
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A thin, capery feeling that made him swallow more often.
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Each swallow felt slightly slower than the last.
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Even the breeze that touched his face felt warm,
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drying the edges of his lips.
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As he stood there, sensing each of these small changes,
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a gentle question surfaced naturally inside him.
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Why do we get thirsty?
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So, let's help AumSum solve this question.
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Why do we get thirsty?
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The human body is made up of a large amount of water,
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which helps regulate temperature, transport nutrients,
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support chemical reactions, and keep organs working efficiently.
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Because water is constantly used,
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lost, or redistributed within the body,
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it must be replaced regularly.
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The first place where the need for water is detected is deep inside the brain,
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within a region called the hypothalamus.
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It keeps track of how much water is present in the blood and tissues.
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When the body begins to lose water through breathing,
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sweating or normal chemical activities,
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the blood becomes slightly more concentrated.
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This concentration is sensed by special cells in the hypothalamus known as osmoreceptors.
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These cells are very sensitive and notice even the smallest changes in water balance.
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When they detect that the body's fluids are becoming too concentrated,
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they send signals that create the feeling of thirst.
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Thirst can also occur when the body becomes warmer.
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During physical activity or on a hot day,
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the body releases sweat to cool itself down.
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Sweat contains water and minerals,
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and losing these fluids increases the concentration of the blood.
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As soon as this happens,
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the thirst signal grows stronger to encourage the person to replace what has been lost.
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The mouth and the throat play a small but noticeable role as well.
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When the tissues in these areas dry out,
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the body receives sensory information that supports the thirst response.
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The kidneys also contribute to thirst by monitoring changes in blood pressure and blood volume.
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When the body loses water,
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the total volume of blood circulating through the vessels decreases.
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Specialized cells within the kidneys,
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called juxtaglomerular cells, detect this drop.
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In response, they release a hormone called renin,
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which begins a chain reaction known as the renin-angiotensin system.
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This system tightens blood vessels and directly stimulates areas of the brain that generate the desire to drink to drink.
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Thirst is also influenced by the body's internal clock,
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known as the circadian rhythm.
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Throughout the day, the brain adjusts hormones and signals that control hunger, temperature, and hydration.
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Research shows that the brain increases thirst slightly,
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in the late afternoon and early evening, even before dehydration occurs occurs.
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This anticipation helps the body prepare for nighttime,
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ensuring that tissues remain hydrated,
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blood stays balanced, and cellular functions continue smoothly through the night.
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The hormone system becomes involved too.
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When the body needs more water,
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the hypothalamus instructs the pituitary gland to release a hormone called vasopressin.
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This hormone travels through the bloodstream to the kidneys,
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signaling them to conserve water instead of releasing it as urine.
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This process slows down water loss while the person finds and drinks more fluid.
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Food also influences thirst.
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Salty foods increase the concentration of sodium in the bloodstream.
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When this concentration rises, the osmoreceptors detect the imbalance and create the feeling of thirst to help dilute the excess salt.
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Dry foods can also stimulate thirst indirectly by drawing water into the digestive system to help break them down.
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The environment shapes this feeling as well.
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Hot weather, dry air, windy conditions or high altitudes increase fluid loss without people always noticing.
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Even speaking for long periods or breathing faster than usual can reduce moisture in the mouth and throat,
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encouraging the thirst response.
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Vocabulario y notas de pronunciación para esta lección
Esta lección de conversación de nivel C1 se basa en el vídeo “Why do we get Thirsty?”. Las palabras que más se repiten: thirst, blood, hormone, feeling, fluid. Este vídeo tiene 75 frases y 699 palabras para practicar shadowing. La parte hablada dura 5:26. El hablante mantiene un ritmo constante de unas 128 palabras por minuto, cómodo para el shadowing. Solo el 73 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente.
Vocabulario clave de este vídeo
Las 15 palabras más avanzadas del vídeo, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| thirst sustantivo | /θɝst/ | sed |
| hormone sustantivo | /ˈhoɹmoʊn/ | hormona |
| detect verbo | /dɪˈtɛkt/ | detectar |
| hypothalamus sustantivo | hipotálamo | |
| kidney sustantivo | /ˈkɪdni/ | riñón |
| bloodstream sustantivo | /ˈblʌd.stɹɪim/ | torrente sanguíneo |
| renin sustantivo | /ˈɹi.nɪn/ | renina |
| stimulate verbo | /ˈstɪm.jəˌleɪt/ | estimular |
| thirsty adjetivo | /ˈθɝs.ti/ | sediento, tener sed |
| swallow verbo | /ˈswɑ.loʊ/ | tragar, engullir |
| concentrate verbo | /ˈkɑn.sən.tɹeɪt/ | concentrar |
| angiotensin sustantivo | /ænd͡ʒɪəʊˈtɛnsɪn/ | angiotensina |
| circadian adjetivo | /sɚˈkeɪ.di.ən/ | circadiano |
| circulate verbo | /ˈsɝ.kjʊˌleɪt/ | circular, roldar |
| conserve verbo | /kənˈsɜː(ɹ)v/ | reservar, conservar |
Phrasal verbs que vas a escuchar
| Palabra | Significado |
|---|---|
| slow down verbo | desacelerar, decelerar |
Pronunciación a tener en cuenta
- Los sonidos de “th”: thirst /θɝst/, thirsty /ˈθɝs.ti/, smoothly /ˈsmuːðli/, rhythm /ˈɹɪð.əm/
- Los sonidos de “sh” y “zh”: dehydration /dihaɪˈdɹeɪʃən/, hydration /haɪˈdɹeɪʃən/, specialize /ˈspɛʃəˌlaɪz/, anticipation /ænˌtɪs.əˈpeɪ.ʃən/
- Palabras largas — cuida el acento: angiotensin /ænd͡ʒɪəʊˈtɛnsɪn/, circadian /sɚˈkeɪ.di.ən/, dehydration /dihaɪˈdɹeɪʃən/, pituitary /pɪˈtuɪˌtɛɹi/, redistribute /ˌɹi.dɪˈstɹɪb.jut/
Sonidos difíciles para hispanohablantes:
- s + consonante al inicio — sin añadir una “e” delante: stimulate /ˈstɪm.jəˌleɪt/, swallow /ˈswɑ.loʊ/, specialize /ˈspɛʃəˌlaɪz/, smoothly /ˈsmuːðli/, sprint /spɹɪnt/
- /v/ — no es /b/: los dientes tocan el labio inferior: conserve /kənˈsɜː(ɹ)v/, digestive /daɪˈdʒɛstɪv/, vasopressin /ˌveɪzoʊˈpɹɛsɪn/
- /z/ — sonora, no /s/: specialize /ˈspɛʃəˌlaɪz/, vasopressin /ˌveɪzoʊˈpɹɛsɪn/, breeze /bɹiːz/, pause /pɔːz/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Haz shadowing frase por frase a velocidad normal, repitiendo cada una hasta que tu ritmo coincida con el del hablante.
- Grábate y compara con el original, prestando atención a palabras como thirst, hormone, detect.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.