Question
Blood vessels enter and exit from the of the heart. apex base auricles trigon inferior aspect The great cardiac vein and middle cardiac vein empty into a venous cavity called pulmonary vein. inferior vena cava. superior vena cava. coronary sinus. coronary artery. The chordae tendineae connect the atria to the ventricles. are found in the intervention collar septum. are part of the conducting system of the heart. connect the flaps of the AV valves to the papillary muscles. are a part of the myocardium. The "pacemaker" of the heart is the right bundle branch. left bundle branch. AV node. SA node. PM node. Lymph nodules are small, bean-shaped structures. the site of erythrocyte production. located in the loose connective tissue of the digestive system. composed of an outer cortex and inner medulla. connected together in a series. Tonsils increase in size in adults. are located in both the oral and abdominal cavities. provide protection against bacteria. contain red pulp and white pulp. are not functional in children.
Explanation / Answer
20) the pacemaker of the heart is S. A. NODE which produces electric impulse more readily helps & maintaining the beating rate of the heart..
17) the blood vessel enters and exits from the AURICLES from the heart where it bring and deposit the all de oxygenated blood from all the parts of the body to the heart...
18) it drain the blood to the coronary sinuses..
22) they provide the protection against bacteria.. They are the first line of defense in the body whre the white blood cells interact with the bacteria and viruses entered resulting in inflammation of the portion hence giving indication about the microbes..