Heart

The left ventricle pumps blood to the head and the whole body. The right ventricle pumps blood only to the lungs so therefore a smaller workload. The myocardium (heart muscle) is thicker around the left ventricle to give it extra force to pump the blood over longer distances.

In general when people do something they know they shouldn't have done, their "conscience" kicks in and their emotions stir up fear. They become afraid of the consequences of that action. ("What if I get caught!" "What if I hurt someone's feelings!" "What if I did damage by doing this?" "What if I just cost myself my job!" "What if, what if, what if...") This fear causes the adrenal glands, which are located on top of your kidneys, to secrete hormones that prepare the body for "fight or flight". So...not only does your heart beat faster, your breathing speeds up, your mouth goes dry, and even though you don't realize it, your pupils dilate, your whole body goes "on alert" because it's getting signals that, "Uh oh! Something's wrong!", and those signals are coming from your emotions because you did something you know you shouldn't have.

It's a good thing to listen to those "signals". Most of the time, they can keep you out of trouble!

You may just be anxious. You could be having a slight anxiety attack if you are thinking about the consequences of what might happen after what you did.

Because God made it that way

All the cell of your body are affected by heart disease. The cells of the body need the oxygen and nutrients carried by blood in order to survive. The heart pumps blood. If the heart is unable to adequately pump blood, the cells do not get what they need in order to survive, and will eventually die. Heart disease can be managed by your health care provider, and there are means to make the heart pump better in order to prolong the life of the cells that we need so much to survive.

It effects the lifeblood through the body's systems and assists oxygenation of the blood. It also allows transport throughout of nutrients necessary for life and health.

Hence, creation has allowed that you have ribs and a hard sternum to protect heart and lungs.

atrial and ventricular systole occur at the same time

Liver disease is the only known cause, smoking is also known to contribute

polmonary artery

The quiescent period of the heart is after the ventricle has completed isovolumetric relaxation (or early diastole). In other words, it is after ventricle systole (when the ventricle has completed contraction). During the quiescent period the ventricles are relaxed and begin to fill up with blood. Interestingly, when considering the time of each event (atrial systole, ventricular systole) most of the cardiac cycle has the heart in this relaxation/ quiescent period.

A heart murmur can be indicative of an abnormality with one of the heart valves, which can indeed cause fatigue.

having may bends and twists....it is often used to describe the course an artery takes...having a tortuous course enables the artery to "feed" an area thoroughly with blood.

Bicuspid valve.. a birth defect of the aortic valve.

Heart is in frontol regeion of the chest having its position in the center but slightly shifted towards the left ,protcted by sternum and ribs

After traveling through the body when blood returns to the heart.The blood first enters the right atrium. It then flows through the tricuspid valve into the right ventricle. When the heart beats, the ventricle puts pressure on the blood to push it through the pulmonic valve into the pulmonic artery. Next, the pulmonic artery carries blood to the lungs where it "picks up" oxygen, and leaves the lungs and returns to the heart through the pulmonic vein. The blood enters the left atrium, then descends through the mitral valve, into the left ventricle. The left ventricle then pumps blood through the aortic valve, and into the aorta, it is now pushed to the rest of the body.

Usually in the left side of the chest . Very rarely it can be midline , or even on the right of center.

Yes, he can be revived with CPR, intubation, IV ,emergency drugs like epinephrine and atropine and dopamine to increase heart rate and perfusion.

Hey We can't see anything because its very dark there. :)

Blood flow to the brain is collected from the systemic blood circulation. Blood is pumped through the systemic circulatory system by the left side of the heart, specifically the left ventricle.

Different types of valves and their function.

The pulmonary vein is part of the human circulatory system, which is the heart. There are 4 pulmonary veins, two from each lung. They are:

right inferior

left inferior

right superior

left superior

The heart is a muscle and muscle require oxygenated blood, it is not a special circulatory system it is a extension of the main system. While you might think the heart would have no problem getting enough oxygen-rich blood, the heart is no different from any other organ. It must have its own source of oxygenated blood. The heart is supplied by its own set of blood vessels. These are the coronary arteries. There are two main ones with two major branches each. They arise from the aorta right after it leaves the heart. The coronary arteries eventually branch into capillary beds that course throughout the heart walls and supply the heart muscle with oxygenated blood. The coronary veins return blood from the heart muscle, but instead of emptying into another larger vein, they empty directly into the right atrium.

The heart is made of specialised muscle tissue called cardiac tissue, which is a form of involuntary tissue. It has the ability to contract and relax in a constant rhythm, never fatiguing. It pumps constantly pushing blood through the atria and the ventricles. Supplied with blood vessels and nerves it will continue to contract and relax supplying all the cells in the body with blood full of oxygen and nutrients.

Well yes and no. It is the first ventricle to receive oxygenated blood to pump out again, as the right ventricle does not receive oxygenated blood to pump. It is not the first chamber to reieve oxygenated blood, this is the left atrium which gather blood and pumps it into the left ventricle. However all the ventricles of the heart has a blood supply (like any other organ to brink nutrients and remove wastes) and all receive oxygenated blood from this supply at the same time.