About CIA. We are often asked... The Central Intelligence Agency's primary mission is to collect, evaluate, and disseminate foreign intelligence to assist the president and senior US government policymakers in making decisions relating to the national security. The CIA does not make policy; it is an independent source of foreign intelligence information for those who do. The CIA may also engage in covert action at the president's direction in accordance with applicable law. Who works for the CIA? The CIA carefully selects well-qualified people in nearly all fields of study.
The normal electrical conduction in the heart allows the impulse that is generated by the sinoatrial node (SA node) of the heart to be propagated to, and stimulate, the cardiac muscle (myocardium).he distal portion of the AV node is known as the Bundle of His. The Bundle of His splits into two branches in the interventricular septum, the left bundle branch and the right bundle branch.
The respiratory membrane is formed where the walls of a capillary touch the walls of an alveolus. At the respiratory membrane, gas exchange occurs freely between the air and blood through the extremely thin walls of the alveolus and capillary. Septal cells and macrophages are also found inside the alveoli. Septal cells produce alveolar fluid that coats the inner surface of the alveoli.