Episode notes: Today Ruth talks about the choices we need to make today to assure we are pursuing “health” and how our bodies are wonderfully created if we feed and fuel them well.
Ruth is a stroke survivor sharing tips and advice for rehab, recovery and healthy living including nutrition, exercises, personal care, healing and maintaining a grateful attitude. She can be found online at http://stroke.global were she offers help to stroke survivors and caregivers.
Welcome back to the Healthy Life Podcast... today I want to begin a mini class as it were on health and the body. We learn or take in many things that we hear... some of which are true others are wishful thinking or just false. I want to begin with the main part of our body that is responsible for our function and that is our heart.
The heart is a muscular organ that supplies blood and oxygen to all parts of the body.
It is the center of the circulatory system. It is about the size of a clenched fist, weighs about 10.5 ounces and is shaped like a cone.
On average, your body has about 5 liters of blood continually traveling through it by way of the circulatory system. The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system. The pumping of the heart forces the blood on its journey and is central to the whole system.
The heart is divided into four separate rooms or chambers that are separated down the middle by a muscular wall called the septum.
The four chambers are:
The two atriums are located at the top of the heart and are known as the holding chambers. The two ventricles are located at the bottom of the heart and are known as the pumping chambers. The upper chambers receive Oxygen-depleted blood coming back from the body and the lower chambers (ventricles) pump oxygen-rich blood back out to the body.
So... How does the heart work?
The left side of the heart is used to pump oxygen-rich blood out to the body. The oxygen, which is taken from the lungs, comes from the air we breathe in. Oxygen-rich blood is brought to the left atrium. The valve between the left atrium and the left ventricle opens to let the blood flow down into the ventricle.
After the left ventricle is filled, the valve between the left atrium and the left ventricle closes. This prevents backwash of the blood. The left ventricle then produces a mighty contraction – the “lub” sound – to push the blood out of the heart. Immediately, the valve from the left ventricle out to the aorta – the big blood vessel which carries blood to the tissues – opens and the blood actually begins its journey. The last valve of the heart then shuts again – the dub sound – to prevent flow of blood back into the heart.
When the blood comes back to the heart, it no longer has any oxygen in it. This oxygen-depleted blood enters the right ventricle, gets pushed through the valve leading to the right atrium and is, then, pumped into the lungs where it will be restocked with oxygen. This will start the whole process over again.
Valves or doors allow make sure that blood only flows in one direction and ensure there is no backwash of blood.
Arteries carry blood away from the heart and veins carry blood towards the heart.
What is the Cardiac Cycle? You might ask...
The cardiac cycle is one heart beat. The cardiac cycle is completed when the heart fills with blood and the blood is then pumped from the heart. The audible sounds that can be heard from the heart are made by the closing of the heart valves. The “lub-dup” sound...
There are three stages
The total cycle takes about 0.8 of a second which is the length of one heartbeat! This cycle or one heart beat happens approximately 75 times per minute.
Some Interesting Facts About The Heart
As always we want to thank our sponsor TCM Restoration for helping us by making this podcast possible. Check them out online at tcmrestoration.net
And thank you again for listening... Please feel free to share this podcast with others, offer your feedback and questions, and follow us online at our website stroke.global or on our Facebook page. Well... I look forward to learning more with you tomorrow... as we continue our adventure ...