Heart

They are called arteries, while veins carry the blood back. the vessels that carry blood to/from your heart are arteries. the vessels that carry the blood around your body are veins and capillaries.

Your heart has the ability to change heart rate at will during periods that require it to. For example, during physical exertion, your heart rate will increase to meet the blood-oxygen demand your body needs to keep going. When you sleep, your heart rate as well as metabolism slows as you do not require the same amount of energy as you do when you are awake. Defective hearts, however, have serious side effects. A heart that beats faster than is needed for an unnecessary amount of time can be damaged from the strain and have reduced performance. A heart rate that is lower than needed can dangerously lower your oxygen level used by your muscles, leaving you weak. In extreme cases, when your oxygen levels in your blood stream become too low, you can asphyxiate(suffocate) even if your breathing is normal

Right Atrium>Tricuspid Valve>Right Ventricle>Pulmonary Valve>Pulmonary Artery>Lungs>Pulmonary Vein>Left Atrium>Bicuspid Valve (Mitral Valve)>Left Ventricle>Aortic Valve>Aorta

The function of a check valve is to prevent backward flow of liquid by closing. The check valves close by using fluid pressure. They are two port valves, which means there is an opening for fluid to enter and one for fluid to escape.

The esophagus is located behind the heart. It is a muscular tube that connects the throat to the stomach and runs down the back of the chest cavity, behind the trachea and heart. The esophagus plays a crucial role in the digestion process by transporting food and liquids from the mouth to the stomach through a series of coordinated muscle contractions called peristalsis.

A mammalian heart has four chambers and they are right and left atrium and right and left ventricle.

A metal tube put into a coronary artery to hold it open.

bronchus and why is this in public health ans SAFETY

i think its the pulmonary vein, aorta, and main artery

they get a patient that lives a longer life.

All should function properly if not I recommend seeing a health professional

Right ventricle pumps blood through the pulmonary valve to the pulmonary artery to the lungs

Blood pressure has nothing to do with the chambers of the heart. Blood pressure has to do with the arteries, veins and capillaries.

Atrioventricular valves are two in number. Mitral valve is between the left atrium (upper chamber) and left ventricle (lower chamber). Tricuspid valve is between the right atrium (upper chamebr) and right ventricle (lower chamber). Mitral valve closes when the left ventricle contracts, to prevent back flow of blood into the left atrium. Tricuspid valve closes when the right ventricle contracts. Hence the blood from the ventricles are able to go out of the heart into the blood vessels during ventricular contraction. Mitral and tricuspid valves open when the ventricles relax, permitting blood to enter the ventricles from the atria. This blood is pumped out when the ventricles contracts next time.

The sino-atrial node (or SA node) is located in the right atrium, just below the entrance of the superior vena cava in the upper right portion of the right atrium.

the heart is surrounded by the pericardium. There is the visceral pericardium which is closest to the heart organ and the parietal pericardium which is the outer lining. The lungs are surrounded by the pleural membrane. There is the visceral pleura which is located closest to the lung and the parietal pleura which is the outer lining. The heart and lungs are protected from external damage by the ribcage. The sternal bone is one of the hardest bones in the body and this bone protects the heart from damage.

Yes, that is what defibrillators do. When you have a heart attack your heart is beating out of sync so they stop your heart and it gives it a chance so start beating again normally with all parts in sync.

A heart attack occurs if the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked. If blood flow isn't restored quickly, the section of heart muscle begins to die. If the heart cannot supply blood to other organs they cannot function and will also die.

mainly outdoor sports where the physical workout is more raises heart rate. This happens due to the energy consumption during play,our body need more oxygen, so we breathe heavily and due to this more blood pumps in and out so heart rate raises.

Left ventricle is not a layer, dip head! The appropriate answer would be the myocardium.

Stroke volume is the volume of blood pumped out by a ventricle with each heartbeat. Yes.

I've read in a factual book and seen somewhere online that chickens do lay more eggs when certain music is played near them.

I too read that it does and anything that helps is worth a try. I have had the radio tuned to local country station for four years now and a side benefit is that the radio going overnight helps keep the larger predators away. I am not sure that egg production is any better but I am sure the hens are calmer.

The valves are attached to the heart wall by tendons as this allows the closure of the vavles to be controlled it also makes sure the the valve is completely closed to prevent backflow, which is potentially fatal.

OK i can only assume the question is reffering to the tendinae chordinae which connect the atrioventricular valves to the pappilary muscles projecting from the heart wall? The functions of these structures is to prevent the massive pressure difference, between the vetrivles and actria during systole, from pushing the the valve inside out and thus preventing backflow. NB the pappilary muscles and chordea tendinae are not involved in clossing or openinghte valves they just stop inversion.

Yes, a trained individual can and should start CPR (cardiopulmonary resuscitation) on a person who has just had a heart attack. The goal of CPR is to restore blood and oxygen circulation throughout the body, and in a heart attack the heart stops pumping oxygenated blood throughout the body.