シャドーイング練習: Blood Flow Through the Heart (Made Easy in 5 Minutes!) - 動画で英語スピーキングを学ぶ
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Alright you guys, welcome back to another video lesson.
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My name is Eddie Watson and this is ICU Advantage, where the confidence to succeed begins here, making critical care topics easy to understand.
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Now, if you don't want to miss out on any future critical care lessons that I do, make sure and subscribe to the channel down below.
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Make sure you hit that bell icon though and select all notifications so you never miss out on a new lesson.
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Alright, let's begin.
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In this lesson, let's take a quick look at the flow of blood through the heart.
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And the heart is really the powerhouse of the circulatory system.
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It's continuously moving blood throughout the entire body, providing oxygenated blood and nutrients,
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while also carrying away waste and returning that deoxygenated blood back to the lungs.
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the flow of blood through the cardiac system is vital to being able to understand the problems
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and conditions that can come up along the way at various points.
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We do though need to start off with some basic foundations before we begin.
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So when I'm talking about veins, I'm talking about blood vessels that are carrying blood towards the heart, and then arteries are then blood vessels carrying blood away from the heart.
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And then for the sake of our drawing, blue is going to be used to signify deoxygenated blood and red is going to be our oxygenated blood.
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So with that out of the way, let's go ahead and take a look inside the heart so we can see some of the structures here.
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There are four main chambers, two upper chambers called atria and two lower chambers called ventricles.
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And we have one of each on each side of the heart.
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We have the right atrium, the right ventricle, the left atrium, and the left ventricle.
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And the atria help to fully load the ventricle before it then ejects blood away from the heart.
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The heart can also be divided up into the right and left sides.
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The right side is going to be responsible for deoxygenated blood going right to the lungs, and then the left side is responsible for oxygenated blood that has just left the lungs.
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There's also four heart valves that you need to know, one at the exit of each of the four chambers.
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Exiting from the right atrium, we have the tricuspid valve.
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Then exiting from the right ventricle, we have the pulmonic valve.
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And then exiting the left atrium, we have the mitral valve.
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This is something that also is known as the bicuspid valve.
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And then finally exiting the left ventricle, we have the aortic valve.
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Each of these valves act as a one-way valve to prevent backflow of blood in the system.
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And normal valves have three leaflets, with the exception of the mitral valve, which only has two, hence the name bicuspid.
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And then finally there are the blood vessels, which bring blood to, as well as carry blood away from the heart.
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The inferior vena cava, which has blood originating from the trunk, visceral organs, and the lower body.
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And the superior vena cava, which has blood originating from the head and upper body.
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Which these two together bring most of the deoxygenated blood from the body back to the heart
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and empty into the right atrium.
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Next, we have the pulmonary artery, which is going to carry the deoxygenated blood away from the heart and then to the lungs to be oxygenated.
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From here, we have both the right and left pulmonary veins, which are bringing the oxygenated blood back to the heart and emptying into the left atrium.
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And then finally, the aortic carries the oxygenated blood away from the heart to the rest of the body.
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Alright, now that we've covered the structures, let's actually see how the blood flows through the system.
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We start with the deoxygenated blood returning to the heart via the inferior vena cava and the superior vena cava.
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This blood empties into the right atrium.
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The right atrium then contracts the blood through the tricuspid valve into the right ventricle.
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The right ventricle then contracts, ejecting the blood through the pulmonic valve into the pulmonary artery.
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Now remember this is an artery because the blood is going away from the heart, but it's also blue here because this is still deoxygenated blood.
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The pulmonary artery branches and carries blood to the left and the right lungs to receive oxygen and release carbon dioxide.
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After the blood leaves the lungs, the oxygenated blood is going to return to the heart via the pulmonary veins.
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Again, remember that these are veins because they're carrying blood towards the heart, but they're red here because this is now oxygenated blood.
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The pulmonary veins empty the blood into the left atrium.
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The left atrium contracts the blood through the mitral valve into the left ventricle.
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The left ventricle then contracts, ejecting that blood through the aortic valve, into the aorta, and onto the rest of the body.
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So one more time let's just talk through that again.
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We start with the deoxygenated blood returning to the heart via the inferior vena cava and the superior vena cava.
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This blood empties into the right atrium.
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The right atrium then contracts the blood through the tricuspid valve into the right ventricle.
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The right ventricle then contracts ejecting that blood through the pulmonic valve into the pulmonary artery.
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The blood then travels to the lungs and then returns back from the lungs via the pulmonary veins, which then empty into the left atrium.
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The left atrium contracts that blood through the mitral valve into the left ventricle.
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The left ventricle then contracts, ejecting that blood through the aortic valve to the aorta and onto the rest of the body.
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And remembering the order of the heart valves can be difficult.
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The mnemonic TPMA can help.
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Toilet, paper, my asset tricuspid pulmonic mitral aortic.
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Alright that's all I got that's the blood flow through the heart.
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If you guys like this lesson please leave a comment
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or a like down below really goes a long way to help support this channel as well as
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if you know somebody else who might find this useful make sure and share it with them as well.
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If you haven't already subscribe to the channel down below
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and a special shout out to our awesome Patreon and YouTube members that are out there.
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By showing your support for this channel you guys get additional content
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that you can't get from just the normal YouTube channel here alone.
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Make sure you guys stay tuned for the next lesson that I'm going to release.
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In the meantime, check out a couple really awesome videos I'm going to link to right here.
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As always, thank you guys so much for watching.
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Have a great day.
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このレッスンの語彙とスピーキングのポイント
このC1レベルのスピーキングレッスンは、動画「Blood Flow Through the Heart」を教材にしています。 繰り返し出てくる語は次のとおりです：blood, valve, atrium, ventricle, deoxygenated。 この動画には、シャドーイング用の文が72文、単語が1150語あります。 音声の長さは6:03です。 話す速さは速く、1分あたり約190語です。音のつながりや弱く発音される音が多くなります。 英語の頻出3,000語に含まれる単語は80%だけなので、語彙は難しめです。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| atrium 名詞 | /ˈeɪ.tɹi.əm/ | アトリウム |
| ventricle 名詞 | /ˈvɛn.tɹɪk.əl/ | 心室 |
| oxygenate 動詞 | /ˈɒksɪdʒəneɪt/ | 酸素を送り込む |
| pulmonary 形容詞 | /ˈpʌl.məˌnɛ.ɹi/ | 肺の, 肺性 |
| artery 名詞 | /ˈɑɹ.təɹ.i/ | 動脈 |
| vein 名詞 | /veɪn/ | 静脈 |
| eject 動詞 | /ɪˈd͡ʒɛkt/ | 立ち退かせる, 追い出す |
| inferior 形容詞 | /ɪnˈfɪɹ.i.ɚ/ | 劣る, 賎しい |
| aorta 名詞 | /eɪˈɔɹtə/ | 大動脈 |
| subscribe 動詞 | /səbˈskɹaɪb/ | 購読する |
| leaflet 名詞 | /ˈliːflɪt/ | 散らし, チラシ |
| mnemonic 名詞 | /nəˈmɑnɪk/ | 語呂合わせ, 記憶法 |
| nutrient 名詞 | /ˈnuː.tɹi.ənt/ | 栄養, 栄養素 |
| dioxide 名詞 | /daɪˈɑksaɪd/ | 二酸化物 |
| notification 名詞 | /ˌnoʊtɪfɪˈkeɪʃn̩/ | 通知 |
動画に出てくる句動詞
| 単語 | 発音 | 意味 |
|---|---|---|
| check out 動詞 | 試験する, 検査する | |
| come up 動詞 | 上がる, 登る | |
| go ahead 動詞 | /ˌɡoʊ əˈhɛd/ | どうぞお先に |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | be divided · is known · be oxygenated |
| 関係詞節 who / which + 節 — 人や物について情報を加える | cava, which has · artery, which is · veins, which are |
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | has just left · we've covered |
注意したい発音
話し手はI'm, they're, can'tなど、短縮形や弱形を10回使っています。聞こえたとおりの短い形で発音しましょう。
- 「sh」と「zh」の音: notification /ˌnoʊtɪfɪˈkeɪʃn̩/, shout /ʃaʊt/
- 長い単語（アクセントの位置に注意）: deoxygenate /diˈɒksɪdʒɪneɪt/, oxygenate /ˈɒksɪdʒəneɪt/, pulmonary /ˈpʌl.məˌnɛ.ɹi/, inferior /ɪnˈfɪɹ.i.ɚ/, originate /əˈɹɪd͡ʒɪneɪt/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: ventricle /ˈvɛn.tɹɪk.əl/, pulmonary /ˈpʌl.məˌnɛ.ɹi/, mitral /ˈmaɪtɹəl/, circulatory /ˈsɝkjələˌtɔɹi/, visceral /ˈvɪsəɹəl/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: ventricle /ˈvɛn.tɹɪk.əl/, vein /veɪn/, visceral /ˈvɪsəɹəl/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: inferior /ɪnˈfɪɹ.i.ɚ/, leaflet /ˈliːflɪt/, signify /ˈsɪɡnɪfaɪ/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
- 自分の声を録音して元の音声と比べます。atrium, ventricle, oxygenateなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。