Heart (cor)
The heart is a large, muscular, hollow organ with a weight of about 300 g and approximately the size of the clenched fist of its owner.
Its function is to keep the blood moving by rhythmic activity.
This hollow muscle is built in such a way that, during the contraction of the chambers (systole), the blood is pushed into the large arteries of the general circulatory and the pulmonary systems, while simultaneously it draws the blood from the veins into the auricles.
During the subsequent relaxation of the chambers (diastole), the cardiac ventricles fill up again with blood from the auricles.
The heart and the vessels form the cardiac circulatory system or blood circulation, which supplies all cells of the organism with vital substances, at the same time removing waste products.
In shape, the heart can be compared with a cone lying on its side. It is located in the center of
the thoracic cavity and is almost completely surrounded by the lungs. Two thirds are situated in the
left and one third in the right half of the thoracic cavity.
The inner lining of the heart consists of a thin tissue layer (endocardium), continued on
the outside by a muscular layer (myocardium) which performs
the functions of the heart.
The heart is surrounded by the double-walled heart sac (pericardium).
The heart sac allows the heart to move smoothly within the thoracic cavity and prevents a straining of the cardiac wall.
In its interior, the heart is divided by a membrane (septum) into what is called "right heart" and "left heart". Each half is divided into the atrium and a heart chamber situated below the atrium, the ventricle.
The heart is nourished by its own vascular system, the coronary arteries.
The heart contracts 60 to 80 times per minute each time forcing approximately 0.075 liters (0,02 Gallons) of pulmonary blood from the left heart into the aorta and the same quantity of blood from the right heart into the lung (venous blood).
Day after day, approximately 7,000 liters (1820 Gallons) without tiring!
This is made possible by a muscle type unique to the heart, with longitudinally ramifying fibers, and by its own pacemaker, the sinoatrial node, an aggregation of nerve cells the size of a pinhead in the right atrial wall.
As we see from the picture above. The heart is a very complicated organ. An organ that science cannot explain in mutation processes of evolution. It is more of a design and could not happen by random chance and accident of natural selection. There are to many factors in the design of the human heart that would make it impossible to evolve. Recently medical science has found that the heart communicates to the brain in four separate ways.
- Neurological communication (nervous system)
- Biophysical communication (pulse wave)
- Biochemical communication (hormones)
- Energetic communication (electromagnetic fields)
Neurologically (through the transmission of nerve impulses), biochemically (via hormones and neurotransmitters), bio-physically (through pressure waves) and energetically (through electromagnetic field interactions). Communication along all these conduits significantly affects the brain's activity. Moreover, our research shows that messages the heart sends the brain can also affect performance.
Reference: http://www.heartmath.org/research/science-of-the-heart/soh_20.html
Sorry about the link. The webpage is now locked to where you have to join these people's website in order to view information. This is just one of many examples of how science will block anything a creationist will use to make a point. I should set up an example page on this. For I have at least 5 examples of where things were changed, moved, or in this case locked out with pass word. The fear of the truth must be great.
The infant heart.
While the infant is still in the mother's womb. There are two sources of blood flow. The mother's heart, and the infant heart. The problem with this is that one cannot conflict with the other. So the Creator inserted a special vein, that actually has a muscle, that connects both arteries as shown below.
This vein allows the heart to pump in parallel with the mother's heart. Problem is, it cannot stay open after being born. Infant would die with in minutes. So when doctor slaps the baby on the rear to make it cry, the lungs are used for the very first time. This enriching the blood with a high percent of oxygen. When this highly enriched oxygen reaches this special connecting vein, the muscle around it constricts it shut, and it heals being shut for the rest of the infant's life. This turns the heart from being a parallel pumping mechanism, to a non-parallel pumping mechanism that is required to sustain life from that point forward. But this is not all that happens....
When the vein closes, it creates a high and low pressure side to the heart. This higher blood pressure makes a flap close that is normally open for the first nine months (like a door closing by itself do to air pressure being different from with in a building compared to outside) on the back side of the heart (shown by arrow). Which completes the process in which the heart now can operate on it's own. If the second process does not work, this creates a problem called a "hole in the heart". If not detected in time, baby can suffer complete heart failure in just a few weeks. If bad enough, baby can die with in a few hours. But there's even more...
When the infant heart is working in parallel with the mother's heart. The open flap inside the heart acts as a separating device for oxygenated (red arrow), and unoxygenated blood (blue arrow). This is important because you don't want the two mixing which lowers oxygen percent in the blood that flows to the babies vital organs. There is two veins that supply both types of blood to this section of the heart. The unoxygenated supply is located right next to this flap. While the oxygenated is on the other side. So the exact positioning actually makes the oxygenated blood push the unoxygenated blood into another chamber, which is where it departs back into the mother to become oxygenated again.
This flap not being open, or being obstructed would reduce oxygen getting to the babies vital organs. Which would affect the development of the child in the womb.
