Heart

Too much caffeine may cause you to have what is refered to as "premature atrial contractions" this refers to the heart is having an occsional extra beat. A "heart attack" from too much caffeine is very slim

No. At 5 weeks pregnant the fetus is smaller than the width of your palm. You will be able to see the baby moving.

left ventricle

Myocardial Infarction affects the heart's ability to pump adequate oxygenated blood, nutrients, water and hormones to the rest of the body. It can affect the brain if too much oxygen is deprived from the brain or any other organ for that matter. If the person is treated rapidly and can be saved measures will be take to restore the heart and any other affected organ to better health.

No. The heart is actually divided into four sections. They are the left atrium, right atrium, left ventricle, and finally the right ventricle.

Heart of the Heartland was created in 1995.

Because the hamster is smaller, its heart has to work incredibly fast to keep oxygen and blood throughout its body. The average heartbeat for a hamster is around 450.

The membranes from superficial to deep are:

A sac-like structure called pericardium. It is comprised of two parts - the outer fibrous pericardium and an inner double-layered membrane itself made up of parietal and visceral pericardium.

No. If the heart ever stops, it means that blood (which carries oxygen) no longer circulates around the body. Without oxygen going to various parts of the body (including the brain which is still working during sleep), you would die.

this is possible due to the fact that heart and respiratory function is controled by the cerebelum. This dorsal part of the brain controls such functions we do not control voluntarily such as movent of your arms of legs.

V42.1

No, 7 does not go into 47 a whole number of times.

They may appear to be the wrong way round when we look at a diagram of the heart, but think about it - they are the right way round relative to their location in the body. If you look down at your own heart, the left ventricle will be on the left-hand side; the right ventricle will be on your right-hand side.

I lost 6 (British) pints of blood over 3 days due to internal bleeding. I did not know anything was wrong until I finally collapsed unconscious in my bathroom one morning. I was unconscious for the next 2 1/2 weeks before they could bring me round. So you can survive with only 1/3 of your blood, and go to work as normal. I did.

A simple way for a heart murmur to be detected is by having a doctor listen to your heart using a stethoscope. If they are concerned about it, there are many diagnostic tests that can be used. These include chest X-ray, ECG, CT, MRI or Echocardiogram

The average heart pumps 600L/hr. Which is 14 400L/day. Which is 5 256 000L/yr! (L=litres)

Because an active, physically fit person gnerally has a heart that does not have to work as hard (slower) as someone who is not in as good a shape and the heart has to pump, or work, harder to get the blood circulating. probably thelungs are in much better shape in the physically fit person and since the lungs and the heart interact, the lungs help the heart not work as hard.

The average adult resting heart rate is 60 to 100 beats per minute. Athletes may have a lower resting heart rate.

the pulmonary vein brings the oxygenated blood into the heart from the lungs

Pacemaker cells inside the sinoatrial node in the right atrium spontaneously undergo action potentials at the rate of about 100 beats per minute. While you're alive, innervation from the autonomic system adjusts this rate to suit. These action potentials cause the cardiac muscle to contract, no input from the brain is necessary. As long as the heart muscle has enough energy, oxygen and ions etc that it requires it will continue to beat.

No.

Both men and women have their hearts just a little to the left of the mid-line.

Another name for the walls of ventricles is the Purkinje fibers.

There are two blood vessels that take the blood away from the heart. The PULMONARY ARTERY takes deoxygenated blood from the heart to the lungs to get oxygenated, and the AORTA which takes oxygenated blood from the heart and distributes it to the body.

This depends on the age and health of the child. Children start out much higher than adults and gradually reach the adult rate by around age 10.

Newborns (0 - 3 months old): 100 - 150 beats per minute

Infants (3 - 6 months old): 90 - 120 beats per minute

Infants (6 - 12 months old): 80 - 120 beats per minute

Children 1 - 10 years: 70 - 130 beats per minute

Children over 10 and adults (including seniors): 60 - 100 beats per minute

Well trained athletes: 40 - 60 beats per minute