Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
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The ejaculatory duct is a tube that joins the vas deferens and the seminal vesicle. The ejaculatory duct empties mature sperm and semen into the urethra.
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^^
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pediculosis capitis is the fancy name for it or just infectious i guess
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