Chapter 11 Section 1 words

small artery

largest type of blood vessel; carries blood away from the heart to all parts of the body.

specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impluses beteween them.

specialized tissue in the wall between the atria.

one of the two upper chambers of the heart.

smallest blood vessel.

gas released by body cells

blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.

blood that is oxygen-poor

relaxation phase of the heartbeat

record of the electricity flowing through the heart.

inner lining of the heart

innermost lining of blood vessels

valve between the left atrium and the left ventricle

abnormal swishing sound caused by improper closure of the heart valves.

muscular, middle layer of the heart.

heart rhythm orginating in the sinoatrial node with a resting rate of 60 to 100 beats per middle.

gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.

specialized nervous tissue in the right atrium that begins the heartbeat.

double-layered membrane surrounding the hearts.

artery carrying oxygen-poor blood from the heart to the lungs.

flow of blood from the heart to the lungs and back to the heart

one of two pairs of vessels carrying oxygenated blood from the lungs to the left artrium of the heart.

beat of the heart as felt through the walls of the arteries

partition or wall dividing a cavity

pacemaker of the heart

instrument to measure blood pressure

flow of blood from blood tissue to the heart and then from the heart back to body tissues.

contraction phase of the heartbeat

located between the right atricum and the right ventricle

structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.

thin-walled vessel that carries blood from body tissues and lungs back to the heart.

largest vein in the body.

one of two lower chambers of the heart

small vein