The muscles used to produce a heartbeat are called the "heart."
Systole
systole
The Back muscles are used to make the new heart. :)
Fitness affects the pulse and breathing rate because the more your muscles are used the more they are used to the physical activity you are asking of them to do. Exercising puts a lot of pressure on your muscles and heart, if you are unfit it can make your heart work over time, increasing your heart and breathing rate.
Everyone needs muscles; without muscles, you would not be able to complete any task, from running a marathon to even typing this question. Without muscles, you would not even be able to breathe; your heart would not beat. You would not even be able to sit up. Muscles are used for EVERY action, and are even used when no action is happening. Thus, everyone needs muscles.
Your Heart!
leg muscles lungs heart abdomen etc
No, the mother can't feel the fetal heart beat.
A Stethescope
The voluntary muscles - those used for walking moving and speaking. As opposed to involuntary muscles such as those in your intestine or heart.
The myocardium, or heart, is the most used muscle in the body.
There are several reasons. But the one big reason accompanying them all is that the body is essentially getting excited, all the muscles are being used further and therefore those muscles need blood, so the heart pumps faster Another reason is that sexual excitement is controlled by the sympathetic nervous system which also speeds up heart rate.
all of the muscles around your arms and legs.
All of them!!!!