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16. "What good is the warmth of summer, without the cold of winter to give it sweetness.” — John Steinbeck. 17. "Snowing is an attempt of God to make the dirty world look clean.”
The human heart begins beating at a rate near the mother's, about 75-80 beats per minute (BPM). The embryonic heart rate (EHR) then accelerates linearly for the first month of beating, peaking at 165-185 BPM during the early 7th week, (early 9th week after the LMP).
The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. [1] It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole. [1]
“Winter is not a season, it’s a celebration.” — Anamika Mishra “Every winter has its spring.” — H. Tuttle “If we had no winter, the spring would not be so pleasant: If we did not ...
Use these best winter quotes to embrace the cold weather and celebrate the start of the cozy season. They make great Instagram captions, too! Beautiful Winter Quotes Perfect for Cozy Season
What the eye does not see (the heart does not grieve over) When in Rome, (do as the Romans do). St. Ambrose, 347 AD [35] Whatever floats your boat; When it rains it pours; When life gives you lemons, make lemonade [36] When the cat is away, the mice will play; When the going gets tough, the tough get going
It employs pacemaker cells that produce electrical impulses, known as cardiac action potentials, which control the rate of contraction of the cardiac muscle, that is, the heart rate. In most humans, these cells are concentrated in the sinoatrial (SA) node, the primary pacemaker, which regulates the heart’s sinus rhythm.
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