The flow of blood from the heart to the lungs and back to the heart is called pulmonary circulation.
it is called tinnitus
it is called tinnitus
Pulse.
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.
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
The muscles used to produce a heartbeat are called the "heart."