@lemon.memes.hah on Instagram: "Football players spit so much because exercise increases the amount of protein in saliva. When you exercise, the amount of protein secreted into the saliva increases. A protein mucus named MUC5B makes your saliva thicker when you’re exercising which makes it more difficult to swallow so we tend to spit more. It may occur during exercise because we breathe through our mouths more. MUC5B could activate to stop our mouths from drying out, therefore."

더쿠 - HOT

[いにしえの発動機たち] 1965年頃 コマツインターナショナルトラクタ19馬力

[いにしえの発動機たち] 1956年頃 シバタ発動機 M2型 3.5馬力

[いにしえの発動機たち] 1935年頃? 農工用発動機 3馬力