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I've been wanting to know this for a while but never really got an answer, why do we have a heartbeat,and what keeps it going?

2007-08-02 18:36:02 · 8 answers · asked by Paul M 2 in Science & Mathematics Biology

8 answers

Your heart is composed of a mass of cells that contract themselves in a regular repeating fasion. These cells take their cues from a couple of pace-setting structures located in the heart itself which emit electrical impulses.

Our hearts beat at a rhythym determined by the chemicals and hormones in our bloodstream, this is how your body tells your heart to beat faster if your exerting yourself.

2007-08-02 18:48:11 · answer #1 · answered by bluecuriosity 2 · 0 0

The heart beats on the cell level so it's not as much your heart beating as much as it is a bunch of heart cells beating in rythem. If two different heart cells beating at different rythems come in contact with each other (in a lab dish for instance), they will sync up so it's probably electrical impulses that keep things in order (hence why electricity is used to bring people back to like and to kill them in an electric chair (which is used to stop the heart)).

2007-08-02 18:52:52 · answer #2 · answered by gregory_dittman 7 · 0 0

hiya, finished scientific textbooks are written on those matters, yet indexed under are some incredibly straightforward solutions. the middle is an exceedingly unique organ. incredibly that's a pump and is produced from a particular style of muscle called cardiac muscle. the style of muscle differs from skeletal muscle in that it has a outfitted-in nerve supply that sends out messages for contraction. it somewhat is controlled by utilising a center, in the top chamber of the middle, called the SA Node. The SA Node sends out a message that spreads in the process the middle muscle and alerts the middle to settlement, or beat and pump. it would desire to try this independently of something of the worried device. using fact of this our heart beats promptly many situations a minute. The suggestions is considered the important worried device. many of the nerve alerts that holiday in the process the physique originate and terminate in the suggestions. additionally our suggestions consists of the “larger applications” including emotions, suggestions, creativity, ingenious and prescient and listening to. The suggestions is produced from specific cells called neurons and nerve fibers called axons. Biochemical reactions happen in those cells and deliver chemical messages to different factors of the suggestions and to something of the physique. too lots, or too little, or blockage of those chemical components might reason neurological ailment.

2016-10-09 02:50:52 · answer #3 · answered by kelcey 4 · 0 0

To a bit to jodi's answer, the heart is a muscle. Like other muscles in your body, the electrical impuses cause a chemical reaction within the cells of the heart causing them to contract. The timed contractions are the beats of your heart.

2007-08-02 18:51:46 · answer #4 · answered by Pepper 4 · 0 0

THERE IS MOVEMENT OF BLOOD FROM HEART TO BODY AND FROM BODY TO HEART.THIS PROCESS INVOLVES RHYTHMIC CONTRACTION(MOVEMENT)OF HEART MUSSELS.AS A RESULT OF WHICH THE PUMPING OF BLOOD TAKES PLACE AND BLOOD MOVEMENT OPEN 2 VALVES PRESENT IN CIRCULATORY SYSTEM PRODUCING SOUND OR HEART BEAT.SO WE GET THE HEARTBEAT AS LUB DUB.MOREOVER THE SA NODE AND THE AV NODES PLAY ROLE.THE RHYTHM OF THE HEART BEAT IS CONTROLLED BY A PACEMAKER NATURALLY PRESENT IN BODY TO ALLOW OPENING OF VALVES ON TIME.

2007-08-03 01:42:26 · answer #5 · answered by Anonymous · 0 0

we have a heart beat to keep blood circulating around our body. The 'beat' occurs due to the contractions when blood enters and exits your atria and ventricles (which are the chambers in your heart)...

2007-08-02 18:41:31 · answer #6 · answered by Elle 1 · 0 0

SA node, AV node, his-purkinje network. they give electrical signals to make the heart beat.

2007-08-02 18:43:56 · answer #7 · answered by jodi 2 · 3 0

Wow, what are you? S*****

2007-08-02 18:39:08 · answer #8 · answered by Anonymous · 0 2

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