The medulla oblongata in the brain stem sends a signal down the spinal cord to the sinoatrial (SA) node of the heart to induce contraction. The wave of contraction spread across the heart muscle (which acts partially as both nerve and muscle) to pump blood throughout the chambers.
Exercise works the muscles and increases their demand for oxygen in the blood. The heart must pump harder to get more blood to the muscles to meet this extra demand. The body knows it must pump the heart harder for several reasons. Firstly, the brain tells the heart that it is exercising, and so is likely to need more oxygen. Secondly, special sensory nerves can detect subtle changes in the blood, like low oxygen and acidity, that stimulates the heart.
It simply keeps it circulating throughout the body. Your heart is the one muscle that works all the time and keeps you alive. Your mind and your heart basically depend on each other. The mind tells the heart when to beat, and the heart pumps oxygen-rich blood to the mind. But really all the heart does is allow blood circulation through your body. Best to eat healthy to avoid disturbances in its work, which are usually lethal. (Life threatening.)
A Heart rate monitor.
When the heart rate is too high, e.g. after exercise when you start to rest.
of coarse you can but if you want to make another idea then go right ahead do what your heart tells you to do. bye bye
closed fracture and open fracture
For one thing, you're still alive when you wake up. Obviously you can't observe yourself when you sleep but if someone else were to, they'd see that you still have a pulse and are still breathing.
closed fracture and open fracture
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The heart is a muscle and in fact the most important
A few things: 1. That you are still alive after a while. Your heart sustains you by pumping oxygenated blood throughout your body, and removing deoxygenated blood to the lungs. 2. If you put your fingers at certain vessel points around your body you can feel your pulse - blood coursing through your blood vessels. 3. You can feel your heart pounding, either with or without placing your hands against your ribcage.
your nerveous system(:
My Heart Tells Me - 1944 was released on: USA: 1944
Its pretty obvious, and your brain think not your muscles and your brain tells your muscles what to do so no you don't use muscles to think.
Voluntary muscles chose to be moved and your will. For example your pectoral muscles and or your biceps. You can flex them and move them to your control by giving in nerve signals from your brain to that muscle. Involuntary muscles have automatic neurological control. Example would be the heart, you don't think about it but it still beats, and if you do exercise your brain automatically tells your heart to beat faster to pump more blood into your body.
Voluntary muscles chose to be moved and your will. For example your pectoral muscles and or your biceps. You can flex them and move them to your control by giving in nerve signals from your brain to that muscle. Involuntary muscles have automatic neurological control. Example would be the heart, you don't think about it but it still beats, and if you do exercise your brain automatically tells your heart to beat faster to pump more blood into your body.
The heart itself tells the heart to beat. It contains a small cluster of nerves that act as a biological "pacemaker".