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
youno cartilage dollars rules
The heart is a muscle and in fact the most important
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.
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
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.
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.
The heart itself tells the heart to beat. It contains a small cluster of nerves that act as a biological "pacemaker".