Although William Harvey discovered that the arteries contained blood instead of air in 1616, "almost nothing was known of the life-sustaining work of the blood until modern times" (John R. Rice, D.D., Our God-Breathed Book - The Bible, Sword of the Lord Publishers, 1969, p.
ເຖິງແມ່ນວ່າວິລລ່ຽມຮາວີໄດ້ຄົ້ນພົບວ່າເສັ້ນເລືອດໃຫຍ່ຕ່າງໆປະກອບດ້ວຍເລືອດແທນທີ່ຈະເປັນອາກາດໃນປີ 1616 "ເກືອບບໍ່ມີອັນໃດທີ່ຖືກຮັບຮູ້ເລື່ອງການເຮັດວຽກ ຂອງເລືອດເພື່ອລ້ຽງຊີວິດຈົນຮອດຍຸກສະໄຫມໃຫມ່" (John R. Rice, D.D., Our God-Breathed Book - The Bible, Sword of the Lord Publishers, 1969, p.