User talk:Babsagbo

The Human Heart.

One circulation is to and from the lungs and is known as the pulmonary circulation.

The main artery of the body is the aorta which leaves the left ventricule,and the main vein returning blood to the right atrium is the vena cava.

There are two divisions of this vein,the superior and inferior vena cavae returning blood from the head /neck and remainder of the trunk respectively

The semi –lunar valves are located where the main arteries leave the ventricules.All these valves have the same purpose-to ensure that blood only fows one way through the heart.

THE EVENTS IN THE CARDIAC CYCLE CAN BE DESCRIBED AS FOLLOWS 1.atria contract ,blood is pushed into ventricules under pressure

2.ventricules bulge with blood.pressure forces the triscupid and biscupid valves shut.This causes the first heart sound to be heard with a stethoscope;it sounds likelub.Atria relax and begin to fill with blood.

3.ventricules begin contration,pressure in blood rises and forces open the aortic and pulmonary valves.

4.systole in the ventricules pushes blood in to the aorta and pulmonary artery.These elastic walled and begin to expand.

5.ventricules begin to relax and blood falls with the effect of gravity for a few moments and catches in the pockets of the semi-lunar valves of the aorta and pulmonary artery,pressing them together and closing off the opening.This causes the second heart sound which ,through a stethoscope sonds like dupp.

6.triscupid and biscupid valves are forced open and blood rushes from the filled atria into the ventricules during their diastolic phase.On being filled to about 70 percent capacity,atrial systole occurs and the heart has completed the cycle at the point where it started.

Image tagging for Image:Heart.jpg
Thanks for uploading Image:Heart.jpg. The image has been identified as not specifying the source and creator of the image, which is required by Wikipedia's policy on images. If you don't indicate the source and creator of the image on the image's description page, it may be deleted some time in the next seven days. If you have uploaded other images, please verify that you have provided source information for them as well.

For more information on using images, see the following pages:
 * Image use policy
 * Image copyright tags

This is an automated notice by OrphanBot. For assistance on the image use policy, see Media copyright questions. 12:11, 3 May 2007 (UTC)

Image tagging for Image:Heart1.jpg
Thanks for uploading Image:Heart1.jpg. The image has been identified as not specifying the source and creator of the image, which is required by Wikipedia's policy on images. If you don't indicate the source and creator of the image on the image's description page, it may be deleted some time in the next seven days. If you have uploaded other images, please verify that you have provided source information for them as well.

For more information on using images, see the following pages:
 * Image use policy
 * Image copyright tags

This is an automated notice by OrphanBot. For assistance on the image use policy, see Media copyright questions. 07:24, 5 May 2007 (UTC)