Heart

Normal heart rate is between 70 to 80 per minute. The athlete has stronger heart and the heart rate is about 60 per minute. So the slower resting heart means that your overall health is good.

The bicupid and tricuspid valves close during ventricular contraction. This prevents the backflow of blood from the ventricles to the atria.

diastole is when all 4 chambers of the heart are at rest after a cardiac cycle systole is the term used to describe the heart during a contraction

The chambers at the bottom are called ventricles.

In the first stage, the deoxygenated blood must be pumped to the lungs to be oxygenated again. This is the first stage. From the lungs, the newly oxygenated blood must be pumped back to the body to be used again. This is the second stage. Without these stages, blood could not be properly oxygenated and the body could not function.

The pigs heart has 4 chambers just like most mammals,

It is the Aorta.

The human heart is positioned under the left lung, in the center, slightly to the left in the chest cavity.

The heart has more than two tissues, and each fulfills a specific function. For instance, the muscle tissue of the heart creates force to move blood. The endocardium provides a smooth surface to decrease the risk of clots. The connective tissue of the chordae tendineae is strong to hold the valve leaflets.

Into the pulmonary artery.

Yes, The heart is a long tube that pumps colorless blood from the head back to the rear and then back up to the head again. The blood kind of coats the insides of the ants and is then sucked into the tube and pumped up to the head again. Ants do not have lungs.

You can click the links, below, to view photos of a raw diamond and of a polished diamond.

Their are many diamonds that appear to look like their real. The best way to tell is to put the diamond in a bright light. If the diamond only gives off a little sparkle and shine it most likely is not real.

Generally speaking, a resting heart rate of 91 bpm is not dangerous but not a particularly healthy rate (this is dependant on age and general fitness levels). With a "bad heart" the aim should be to reduce the resting heart rate as much as possible with anything above 100 bpm being considered "of concern". Count Kryzal

It depends on how many you drink. All energy drinks speed up your heart rate ad if you drink alot of them in a small period of time your heart rate could uncontrollably race to where it overwhelms it and that could cause a heart attack.

the valves

no

Have you ever had your thyroid tested. Best to do the Complete Thyroid Panel. Research Hypothyroid/Hashimoto's/Hyperthyroid at www. about.com. Search Thryoid symptoms for their list.

CHAMBERS?

the upper chambers of the heart are called the atria. (or atrium singular)

this question is in my homework and i have no idea

there are two main veins that makes the blood flow toward the heart which are the superior vena cava and inferior vena cava.

The Purkinje fibers work with the sinoatrial node to enable consistency in the contractions of the heart.
Purkinje fibers are muscle fibers in the heart. They relay the contraction impulses from the bundle to the myocardium of the ventricles.
Purkinje fibres transmit the signal that tells the heart to beat from the pacemakers to the heart muscle. They are even capable of generating their own signal if the pacemaker is damaged.