Khan Academy
Learn the basics of microscopy and how it is used to study cells and their structures.
Khan Academy
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Microscopy - Khan Academy
Introduction to microscopes and how they work. Covers brightfield microscopy, fluorescence microscopy, and electron microscopy.
Cell theory questions - Khan Academy
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可汗学院 - Khan Academy
虽然细胞的大小不同，但它们一般都相当小。例如，一个典型的人类血红细胞的直径约为8微米（0.008 毫米）。给你一些参照：一个针头的直径大约是一毫米，所以大约125个红血球可以在 …
可汗学院 - Khan Academy
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Khan Academy
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2021年9月20日 · Sal uses a PC with: Camtasia Recorder ($200*) SmoothDraw3 (Free) Wacom Bamboo Tablet ($80) Prior to that, he used: ScreenVideoRecorder ($20) Microsoft Paint (Free)
Khan Academy
این ویدیو مقدمه ای بر مفاهیم متغیرو معادلات ریاضی می باشد نظرات، پیشنهادات و انتقادات شما مایهی دلگرمی ماست و بزرگترین کمک به ما برای بهبود کیفیت ویدیوها خواهد بود.
Khan Academy
Introduction to microscopes and their working principles, including brightfield, fluorescence, and electron microscopy.