Register
During the systole phase of the cardiac cycle, the left ventricle contracts and blood is pumped into the aorta. Which of these valves prevents a backflow of blood into the left atrium?
156k views
13 votes
During the systole phase of the cardiac cycle, the left ventricle contracts and blood is pumped into the aorta. Which of these valves prevents a backflow of blood into the left atrium?

User HaneTV
by
5.7k points

1 Answer

5 votes
The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left.
User Adam Stanley
by
5.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.6m questions

7.3m answers

Other Questions

Which of these structures is primarily responsible for the enzymatic breakdown of a large molecules in the cell?
What are some common signs and symptoms of mental health disorders?
A state of joyful activity in which the subject performs an action effortlessly and skillfully is known as a(n) __________.
!! Earth Science!! Carbon dioxide is normally approximately 2% fraction of the air in the atmosphere. The reason carbon dioxide is considered a pollutant is because... a) Carbon dioxide levels are much
Which statement best describes the life cycle of plants such as ferns? a. Different plants have a different number of phases in their life cycle. b. Plants have a single life cycle and are entirely haploid.
Link Copied!