@vocal705: 僕の1番推しの歌詞!編集下手くそだけど許してください!

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Wednesday 17 May 2023 15:58:58 GMT
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A heart attack (myocardial infarction) happens when a coronary artery gets clogged. As a consequence of this, blood can’t deliver oxygen to some myocardial cells (heart muscle cells). Myocardial cells need a high constant supply of oxygen for them to be able to produce ATP energy by cellular respiration. If a group of myocardial cells does not receive oxygen, then they won’t be able to produce energy. If these myocardial cells stop producing energy, then not only they will stop contracting (which takes a lot of energy) but in a matter of minutes they will die (being alive requires energy!).  . Dead myocardial cells will eventually be replaced by fibroblasts and scar tissue will get formed. The problem is that unlike myocardial cells, scar tissue cells can’t contract. Therefore, the heart of a patient that survives a heart attack will beat less strongly. The good news is that heart attack patients can to some extent compensate the loss of contractile myocardial cells by strengthening the rest of the heart muscle and this way they can improve their long-term quality of life. . I love the staining that shows the connections between myocardial cells (intercalated discs) and their nuclei. I also love the last staining of heart tissue that shows the beauty of the cardiac muscle arrangement and the striations pattern of the cardiac muscle cells. . The heart is such an incredible organ! It is difficult to imagine that the muscle cells of an average human heart need to contract more than 100,000 times each day!! Just incredible!! . For this video I used a Leica ZOOM 200 stereoscope and an Olympus BX41 microscope at up to 400X magnification. #microscopy #microscope #physiology #heart #myocardium #heartattack #intercalateddisc #hearthistology #drbioforever
A heart attack (myocardial infarction) happens when a coronary artery gets clogged. As a consequence of this, blood can’t deliver oxygen to some myocardial cells (heart muscle cells). Myocardial cells need a high constant supply of oxygen for them to be able to produce ATP energy by cellular respiration. If a group of myocardial cells does not receive oxygen, then they won’t be able to produce energy. If these myocardial cells stop producing energy, then not only they will stop contracting (which takes a lot of energy) but in a matter of minutes they will die (being alive requires energy!). . Dead myocardial cells will eventually be replaced by fibroblasts and scar tissue will get formed. The problem is that unlike myocardial cells, scar tissue cells can’t contract. Therefore, the heart of a patient that survives a heart attack will beat less strongly. The good news is that heart attack patients can to some extent compensate the loss of contractile myocardial cells by strengthening the rest of the heart muscle and this way they can improve their long-term quality of life. . I love the staining that shows the connections between myocardial cells (intercalated discs) and their nuclei. I also love the last staining of heart tissue that shows the beauty of the cardiac muscle arrangement and the striations pattern of the cardiac muscle cells. . The heart is such an incredible organ! It is difficult to imagine that the muscle cells of an average human heart need to contract more than 100,000 times each day!! Just incredible!! . For this video I used a Leica ZOOM 200 stereoscope and an Olympus BX41 microscope at up to 400X magnification. #microscopy #microscope #physiology #heart #myocardium #heartattack #intercalateddisc #hearthistology #drbioforever
The cellular arrangement of a plant leaf is a masterpiece of biological art. . It is just incredible to zoom in at different levels of magnification and be able to see what’s going on inside the cells that make up the leaf.  . But the most amazing thing is that when I looked at the leaf at very high magnification, I could see the chloroplasts moving inside the cells! (chloroplasts are the organelles of the cell that perform photosynthesis). . The chloroplasts do not move by themselves. They get moved by cytoplasmic streaming, which is a mechanism that cells have to move things around in the cytoplasm using the cytoskeleton.  . Circling the chloroplasts around the cell by cytoplasmic streaming makes photosynthesis work more efficiently because the chloroplasts get more exposure to sunlight. Since photosynthesis requires light energy, more sunlight energy means more photosynthesis. What a beautiful way to maximize the efficiency of photosynthesis! . I am still in awe at the fact that when I zoomed at super high magnification, I could see the thylakoids of the chloroplasts! . By the way, plants are green because the pigments that they use to harvest sunlight energy are green and these pigments are located in the chloroplasts (you can see that the rest of the cell is not green. Just the chloroplasts).  . To make this video I used an aquatic plant called Elodea. The reason why I used this plant is because this plant has very thin leaves, which are ideal to see their cells under the microscope. . For this video I used an Olympus CX31 microscope at up to 1000x magnification.   #elodea #photosynthesis #plantbiology #chloroplasts #naturalshapes #shapesofnature  #cytoplasmicstreaming #leaf #art #drbioforever
The cellular arrangement of a plant leaf is a masterpiece of biological art. . It is just incredible to zoom in at different levels of magnification and be able to see what’s going on inside the cells that make up the leaf. . But the most amazing thing is that when I looked at the leaf at very high magnification, I could see the chloroplasts moving inside the cells! (chloroplasts are the organelles of the cell that perform photosynthesis). . The chloroplasts do not move by themselves. They get moved by cytoplasmic streaming, which is a mechanism that cells have to move things around in the cytoplasm using the cytoskeleton. . Circling the chloroplasts around the cell by cytoplasmic streaming makes photosynthesis work more efficiently because the chloroplasts get more exposure to sunlight. Since photosynthesis requires light energy, more sunlight energy means more photosynthesis. What a beautiful way to maximize the efficiency of photosynthesis! . I am still in awe at the fact that when I zoomed at super high magnification, I could see the thylakoids of the chloroplasts! . By the way, plants are green because the pigments that they use to harvest sunlight energy are green and these pigments are located in the chloroplasts (you can see that the rest of the cell is not green. Just the chloroplasts). . To make this video I used an aquatic plant called Elodea. The reason why I used this plant is because this plant has very thin leaves, which are ideal to see their cells under the microscope. . For this video I used an Olympus CX31 microscope at up to 1000x magnification. #elodea #photosynthesis #plantbiology #chloroplasts #naturalshapes #shapesofnature #cytoplasmicstreaming #leaf #art #drbioforever

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