Aortic and pulmonary orifices, Biology

Assignment Help:

These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger than the aortic orifice. The aortic orifice is placed in front and to the right of the mitral orifice. The pulmonary orifice is placed above and to the left of the tricuspid orifice and the aortic orifice intervening between them. The pulmonary orifice is guarded by the pulmonary valve and the aortic orifice by the aortic valve. Each valve consists of three semilunar cusps. Each cusp is triangular. It has a convex edge which is attached to the part of the margin of the orifice. It has two free margins that meet at the apex of the cusp. Each cusp consists of a double fold of endocardium with some fibrous tissue in it. The region of the apex is thickened to form a nodule while crescentric parts near the free edges are called lunules.

903_Aortic and Pulmonary Orifices.png


Related Discussions:- Aortic and pulmonary orifices

Lungs, what is the lungs structure in relation to the excretory system?

what is the lungs structure in relation to the excretory system?

What proportion of progeny pairs gt or ac have, A haploid cross is made in ...

A haploid cross is made in which the mutant allele has GC at base position 200 in the DNA of a certain gene, and the wild type has AT. What proportion of progeny will have the hybr

How does the nervous system get information, Q. How does the nervous system...

Q. How does the nervous system get information about the external environment, the organs and the tissues? Information about the conditions of the internal and external environ

Duodenum participating in extracellular digestion, Q. Besides the liver whi...

Q. Besides the liver which is the other adnexal gland of the digestive system that releases substances in the duodenum participating in extracellular digestion? The other adnex

Explain the analysis of food samples, Explain the Analysis of Food Samples?...

Explain the Analysis of Food Samples? Now, in this practical, we shall deal with the endogenous and exogeneous microorganisms which are present on the food as contaminants. We

Explain about the derived proteins, Explain about the Derived Proteins? ...

Explain about the Derived Proteins? These are not naturally taking place proteins and are obtained from simple proteins by the action of enzymes and chemical agents, heat, mech

What are the homologous chromosomes, Q. What are the homologous chromosomes...

Q. What are the homologous chromosomes? Which are the human cells that do not have homologous chromosomes? Chromosomes contain genes genetic information in the form of nucleoti

Is diabetes causes the cardiovascular disease, Q. Is Diabetes causes the ca...

Q. Is Diabetes causes the cardiovascular disease? Diabetes: Sustained hyperglycemia is associated with tissue damage and cardio- myopathies. You shall study about diabetes and

Briefly explain how amniocentesis used in genetic screening, Briefly explai...

Briefly explain how amniocentesis and chorionic villi sampling are used in genetic screening. A small sample is removed from the amniotic fluid surrounding the fetus or from t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd