Ned Weeks
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4 days ago · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds. Learn more about the heart in this article.
- Heart Summary
The human heart is a four-chambered double pump with its...
- Human Organs Quiz
More than 1 gallon (3.8 liters) of blood pass through the...
- Systole
systole, period of contraction of the ventricles of the...
- Heart Sounds
heart sound, audible rhythmic vibrations in the heart,...
- The Human Body Quiz
The Human Body Question: Name the blood vessel that carries...
- Chambered Heart
Other articles where chambered heart is discussed:...
- Coronary Heart Disease
coronary heart disease, disease characterized by an...
- Diastole
diastole, in the cardiac cycle, period of relaxation of the...
- Heart Summary
2 days ago · In a normal heart, the heart rate is the rate at which the sinoatrial node depolarizes since it is the source of depolarization of the heart. Heart rate, like other vital signs such as blood pressure and respiratory rate, change with age.
3 days ago · It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and from Latin vascula meaning vessels). The circulatory system has two divisions, a systemic circulation or circuit , and a pulmonary circulation or circuit . [3]
4 days ago · What is Heart Rate Variability (HRV)? As popular as the metaphor may be, a healthy heart doesn’t beat as regularly as a metronome — in fact, it changes its rhythm with each beat. This constant variation in milliseconds between your heartbeats is known as your heart rate variability, or HRV.
4 days ago · Overall, Oura members’ resting heart rates range from the mid-50s to mid-60s. This chart shows that resting heart rate increases slightly until about age 60, at which point it levels off and lowers slightly. For female Oura members, the average lowest RHR is 58.1 and for men, it’s 54.5.
4 days ago · Normal pulse rates often sit between 60 and 100 beats per minute, which may differ due to physical fitness, stress, and medication (LeWine, 2023). However, heart rate can also change from minute to minute as a response to the environment or the type of activity the body is performing.
8 hours ago · The heart is a muscle that squeezes blood and functions like a pump. The heart's systems can be classified as either electrical or mechanical, and both of these systems are susceptible to failure or dysfunction.
