Question

Blood flows through the vena cavae and coronary sinus into the right atrium, through the ______ to the right ventricle, then through the pulmonary valve to the pulmonary trunk and its branches. From there, blood enters the ______ associated with the alveoli of the lungs.

1) tricuspid valve, alveolar capillaries
2) mitral valve, bronchial capillaries
3) tricuspid valve, bronchial capillaries
4) mitral valve, alveolar capillaries

Answer 1

Blood flows through the tricuspid valve to the right ventricle, and then through the pulmonary valve to the pulmonary trunk and its branches. From there, it enters the alveolar capillaries associated with the alveoli of the lungs.

Step-by-step explanation:

Blood flows through the vena cavae and coronary sinus into the right atrium, through the tricuspid valve to the right ventricle, then through the pulmonary valve to the pulmonary trunk and its branches. From there, blood enters the alveolar capillaries associated with the alveoli of the lungs.

Blood flows through the vena cavae and coronary sinus into the right atrium, through the tricuspid valve to the right ventricle, then through the pulmonary valve to the pulmonary trunk and its branches. From there, blood enters the pulmonary capillaries associated with the alveoli of the lungs. The correct answer to the question is: 1) tricuspid valve, alveolar capillaries. After going through gas exchange in the alveoli, where oxygen is taken up and carbon dioxide is released, the oxygenated blood is returned to the left atrium via the pulmonary veins.