The Human Heart & Blood
The Human Heart & Blood
The human heart is a four chambered muscle that maintains blood flow in the circulatory system. Located right behind the sternum and between the lungs. The apex, or bottom of the heart, is tilted to the left side. At rest the heart pumps about 59 cc (2 oz.) of blood per beat and 5 qt per minute. During exercise it pumps 120-220 cc (4-7.3 oz.) of blood per beat and 21-32 qt per minute. The adult heart is about the size of a fist and weighs about 250-350 grams (9oz).
Tidbit: if the human heart stopped beating for more 3-4 minutes permanent brain damage may occur
The heart is made up of two muscle masses. One of these forms the two atria (upper chambers) of the heart, and the other forms the two ventricles (lower chambers). Both atria contract or relax at the same time, as do both ventricles.
An electrical impulse called action potential is generated at regular intervals in a specialized region of the right atrium called the sinoauricular (or sinoatrial, or SA) node. Since the two atria form a single muscular unite, the action potential will spread over the atria. A fraction of a second later, having been triggered by the action potential, the atrial muscle contracts.
The ventricles form a single muscle mass separate from the atria. When the atria action potential reaches the juncture of the atria and the ventricles, the atrioventricular, or AV, node conducts the impulse. After a slight delay, the impulse is passed by way of yet another bundle of muscle fibers called the Bundle of His and the Purkinje System. Contraction of the ventricle follows quickly after the onset of its action potential.
The rate at which the cells of the SA node discharge is externally influenced through the autonomic nervous system, which sends nerve branches to the heart. Through their stimulatory and inhibitory influences they determine the resultant heart rate. In adults at rest this is between 60 and 74 beats a minute. In infants and young children it may be between 100 and 120 beats a minute. Tension, exertion or fever may cause the rate of the heart to vary between 55 and 200 beats a minute.
The heart muscle pumps blood through the body by means of rhythmical contractions (systole) and relaxations or dilutions (diastole). The heart’s left and right halves work almost synchronously. When the ventricles contract (systole), the valves between the atria and the ventricles close as the result of increasing pressure, and the valves to the pulmonary artery and the aorta open. When the ventricles become flaccid during diastole, and the pressure decreases, the reverse process takes place. Below will be a couple images to display the heart’s makeup and the operation of blood flow to and from the heart.
From the lungs the blood is returned to the heart through the pulmonary veins, two from each lung. From the pulmonary veins the blood enters the left atrium and then passes through the mitral valve to the left ventricle. As the ventricles contract, the mitral valve prevents back flow of blood into the left atrium and the blood is driven through the aortic valve into the aorta, the major artery that supplies blood to the entire body. The aortic valve, like the pulmonary valve, has a semi lunar shape.
Through systemic circulation and perfect order a one way flow of blood is maintained by valves located, not only in the heart, but in the veins as well. Some veins also have semi lunar valves and the pressure of the contracting muscles against the veins works with the actions of these valves to increase the venous return to the heart. This is the reason that exercise is so important for circulation of blood and lymphatic systems. Some great herbs to increase circulation of these systems are Burdock Root, Yellowdock Root, Nettle Root/Leaf, Dandelion Root/Leaf, and Sarsaparilla Root. All these herbs can be found in our products at Back-2-Eden.net in “Hormones in Harmony” and “Nature’s Cleanser”.
“But flesh with the life thereof, which is blood thereof, shall ye not eat”
“And whatsoever man there be of the house of Israel, or the strangers that sojourn among you, that eateth any manner of blood; I will even set my face against that soul that eateth blood, and will cut him off from among his people. For the life of the flesh is in the blood…….”
God knew what He was doing at creation, providing an order of operations even to the small molecule in our bodies. The blood provides life-supporting oxygen and nutrients (food nourishes) to every cell of the body and removes their waste products. It also helps maintain body temperature, transports hormones, and fights infections. The brain cells in particular are very dependent on a constant supply of oxygen.
Blood has two main constituents. The cells, or corpuscles, comprise about 45% and the liquid portion, or plasma, in which the cells are suspended comprises 55%. The blood cells comprise three main types: red blood cells, or erythrocytes; white blood cells, or leukocytes, which in turn are many different types; and platelets, or thrombocytes. Each type of cell has its own individual functions in the body. The plasm is a complex colorless solution, about 90% water, that carries different ions and molecules including proteins, enzymes, hormones, nutrients and waste materials such as the urea, and fibrinogen, the protein that aids in clotting.
Red blood cells are tiny, round, biconcave disks, averaging about 7.5 microns (0.003 inches) in diameter. A normal man has about 5.3 qt of blood in his body, containing more than 25 trillion red blood cells. Because the normal life span of red blood cells in circulation is only about 120 days, more than 200 billion cells are normally destroyed each day by the spleen and must be replaced. Red blood cells, as well as most white blood cells and platelets, are made by the bone marrow.
To summarize the importance of our blood, one must fully understand that our dietary choices directly effect the health thereof. When we consume food our digestive system turns it into what is known as churn (liquifies it), removing wastes and minerals/nutrients and absorbing them into the blood stream to further eliminate them via urine or bowels. When we (especially for generations and years) consume foods with little or no nutritional value our digestive system and cellular life is damaged greatly. Cells become susceptible to apoptosis or even worse the survival thereof apoptosis, resulting in cancerous cells, and tissues become inflamed (tissues are made up of cells, as are all the organs in our body). Cells need minerals, minerals breed life and feed life. Metabolic waste leads to cellular death. Metabolic waste empties into the blood stream and is difficult for the body to excrete and eliminate, especially in such large amounts as that which is contained in the Standard American Diet. We eat, we don’t pass bowels, we eat, and we don’t eliminate. Fecal matter is backed up similar to grease being poured into your sink causing clogged pipes, then adding any foods only adds to the fermenting of what is already lying stagnant. Fermented foodstuffs lead to bacterial susceptibility and presence which in turn effects gut flora and balance resulting in many chronic illnesses and immune dysfunction (autoimmune disorders). What does the allopathic industry do ? They ascribe a name to each disorder and never attribute a solution to the holistic functioning of the human body which is laid out so simply in anatomical and physiological understanding. We understand what the cell needs but refuse to give it to our bodies, we understand what is detrimental to our vitality yet we refuse to remove the obstructions which cause horrific symptoms. We need to progress, not be perfect but progress to a state of health by which vitality is no longer seen as the “rare” exception. Stop surviving and start thriving, stop suffering and begin healing. When provided the correct environment our blood will deliver the necessary minerals needed to restore, regenerate and maintain a level of homeostatic union which we were designed by Our God to be in existence with. Herbs, fruit, and other plants should be our main source of fuel. By definition, food is any substance which nourishes life, and unfortunately we have been fooled into thinking whole foods are just a side note, something we should have just in case. In most cases, fruit is seen as this sugary substance which can cause issues if eaten too much as opposed to its astringent and antioxidant properties which can both treat and prevent many chronic illnesses from type 2 diabetes to psoriasis to leaky gut.
Let us progress, let us regenerate our health, let us be images of true health for those without hope.
Back To Eden Natural Health & Wellness
Gabriel Blake, Certified Natural Health & Wellness Consultant