The flow of blood from the heart to the lungs and back to the heart is called pulmonary circulation.
Pulse.
it is called tinnitus
it is called tinnitus
A dog's heart beat can vary from 100 to 150 beats per minute depending on the breed. Normally, the smaller the dog the faster the beats. Yes, but if it beats too fast there's a problem. If this is happening see the vet. Our dog's heart speeds up when she hears thunder / lightning and / or fire works.
How does an insects heart beat How does an insects heart beat How does an insects heart beat How does an insects heart beat
It is called a Irregular heartbeat.
cardiac cycle
Pace Maker
The lower left chamber of the heart is called the left ventricle. It is thick and muscular hence manifests a stronger heart beat.
it doesn't beat, it pumps... and doctors count the pumps called beats.
A stethoscope