What events occur during the cardiac cycle?

Within the heart the atria contract creating a high pressure and squeezing blood into the ventricles. The semi lunar valves are closed so pressure within the ventricles builds up.Pressure within the ventricles becomes greater than in the atria which closes the atrioventricular valves. The cardiac muscle of the ventricle walls contract which causes the pressure in the ventricles to exceed the pressure within the atria and pulmonary artery forcing the semi lunar valves to open and expelling blood from the heart.

James H. GCSE Biology tutor, A Level Biology tutor, GCSE English tutor

1 month ago

Answered by James, an A Level Biology tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist


Laureen J. A Level Biology tutor, GCSE Biology tutor, Mentoring -Medi...
View profile
£22 /hr

Laureen J.

Degree: Graduate Entry Medicine (Other) - Bristol University

Subjects offered: Biology, French+ 1 more

-Medical School Preparation-

“About Me: I am a French medical student at Bristol University. Prior to studying medicine, I completed a BSc (Hons) inBiomedical Sciences and a PhD in Stem Cell research. Needless to say that I love biology and I hope that I can get y...”

PremiumRoslyn I. GCSE English tutor, GCSE Biology tutor, A Level Extended Pr...
View profile
£24 /hr

Roslyn I.

Degree: Anthropology with International Relations (Bachelors) - Exeter University

Subjects offered: Biology, Extended Project Qualification+ 2 more

Extended Project Qualification
-Personal Statements-

“My name is Roslyn Irving and I am currently studying for a degree in Anthropology and International Relations. Having taken Science A-levels as well as English I am in a good position to ”

Elizabeth L. 13 plus  Maths tutor, GCSE Maths tutor, 11 Plus Maths tu...
View profile
£22 /hr

Elizabeth L.

Degree: Veterinary Science (Bachelors) - Bristol University

Subjects offered: Biology, Science+ 5 more

.BMAT (BioMedical Admissions)
-Personal Statements-

“All About Me:  I am currently studying Veterinary Science at the University of Bristol. My love of science and the desire to work with people and animals means that I thoroughly enjoy my course. I have had part time jobs working with...”

About the author

James H. GCSE Biology tutor, A Level Biology tutor, GCSE English tutor
View profile
£20 /hr

James H.

Degree: Biology (Bachelors) - Bristol University

Subjects offered: Biology, English


“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Other A Level Biology questions

Describe the use of promoters in gene technology

What events occur during the cardiac cycle?

Describe the process of translation

What are the different phases of the cell cycle?

View A Level Biology tutors


We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss