Veins can be round also. However arteries have a higher pressure than veins. One reason that a tech uses a band around the arm to take blood from a vein is to make it more prominent or "round".

When the artery walls lose their elasticity, this is called arteriosclerosis. When this happens, the body has a tougher time circulating blood.

veins move blood to the heart; arteries move blood away from the heart. Blood goes from the heart to the lungs to get oxygen, then back to the heart, then to the body (to deliver the oxygen), then back to the heart, where it starts the process over again.

Pulmonary Embolism

means all the major arteries of the heart are attached essentially backwards... which is bad... usually leads to death very very quickly after birth, but after the mustard procedure was invented in the 70's it has been used as an open heart procedure to fix the problem. and the patients can live a normal life... however its important that in later years if a heart problem does eventually arise that the current Dr. know of the procedure and transposition.

Actually the above answer is correct for D-TGA (simple transposition of the great arteries). In L-TGA the lower vetricles are reversed, the heart itself is structurally abnormal, the arteries corrected and are coming off the opposite ventricle, in other words the right atrium feeds the left ventricle (sitting on the right side of the heart) and vise versa. The problem is while circuation can occur the heart is pumping from the wrong parts, and will eventually fail. Also these kids have rhythm problems (needing drugs and pacemakers) and many other anomolies like a PDA (hole between the ventricles) and coarction of the aorta. The surgery to correct this complex problem is called a double switch procedure sometimes with an atrial baffle. The other option is a transplant.

Each artery in the human body has a baro-receptor. These baroreceptors, when innervated, cause dilation and constriction of the artery. For instance, if someone is losing a vast amount of blood, the baro-receptor notices a decrease in volume and sends an impulse to the brain which changes the amount of hormone released from the pituitary gland. The hormones are known as prostaglandins and have been pharmacologically refined to assist with the dilation in the pulmonary vessels. You may know this drug to be Viagra.

coronary arteries.

The external carotid artery is responsible for supplying blood the the face, jaw, scalp, and the base of the skull.

444.81 (I think)

I think it is the cappilaries but those could be veins.

It is called the systolic blood pressure and is given by the higher of the two numbers on your blood pressure reading. eg, if your blood pressure is 120/80, the systolic pressure is 120mmHg.

The actual pressure follows a wave-form. As the ventricle contracts and squeeze blood into the arteries the pressure rises (from the lower diastolic level) and as contraction continues the pressure peaks and then drops back as the contraction finishes and the heart begins to relax. So to be specific the pressure will depend upon what phase of contraction one is referring to. However generally speaking it is the peak, as explained above, that is referred to.

dense connective tissue, elastic

they are the right and left ventricle

The coronary arteries.

There are two arteries in a persons wrist, almost on either side of the wrist. One is the radial artery, and ulnar artery is the other one.

The purpose of the femoral artery is to circulate blood around the thigh area as well as provide blood to the knees and feet. This process is critical as cells within the body require oxygen to survive and blood carries this oxygen to them.

33420 Valvotomy, mitral valve; closed heart 33.96 $1,293

33422 Valvotomy, mitral valve; open heart, with cardiopulmonary bypass 42.52 $1,619

Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet

Veins

Carotid Ultrasonography