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

What are the functions of fibers, Of which substance do elastic fibers of t...

Of which substance do elastic fibers of the connective tissue are made? What are some functions of these fibers? The elastic fibers are made of a protein called elastin. Ela

How computed tomography helps the doctors, Explain briefly how computed tom...

Explain briefly how computed tomography (CT) helps the doctors in pinpointing the defects in the patient's body

Define the term ancestral characteristic, Define the term Ancestral charact...

Define the term Ancestral characteristic A character shared by all members of a taxonomic group of organisms (taxon) and used to define the unique nature of the group. The cha

Phototropic curvature is the result of uneven distribution, Phototropic cur...

Phototropic curvature is the result of uneven distribution of : 1. Gibberellin 2. Phytochrome 3. Cytokinins 4. Auxin Auxin

What is classic repair in ventricular aneurysm, Classic Repair (Linear repa...

Classic Repair (Linear repair) :  The operation is done under cardio pulmonary bypass, through median sternotomy. If additional CABG is required, conduit harvesting is done.

Metabolism of galactose, The hydrolysis of the disaccharide lactose (in mil...

The hydrolysis of the disaccharide lactose (in milk) give up glucose and galactose. Thus galactose is also a major dietary sugar for humans. Glucose and Galactose are epimers which

What is the evolutionary importance of pteridophytes, What is the evolution...

What is the evolutionary importance of pteridophytes? As the first tracheophytes, pteridophytes were also the first plants to extensively colonize the terrestrial environment f

Explain about nutritional recommendations for healthy ageing, Explain about...

Explain about the Nutritional recommendations for Healthy Ageing? You would recall reading about meal planning during various stages of life, spanning right from the infancy ti

Explain the nutrient composition of different milk, Explain the Nutrient co...

Explain the Nutrient composition of different milk? Sometimes exclusive breast-feeding cannot be sustained. Working mothers join their duty in the fourth month and exclusively

What is black mold, What is black mold? Mold is a fungus. Black mold is...

What is black mold? Mold is a fungus. Black mold is not an official term, since it is not possible to tell with the naked eye what type of mold is present, and many of them app

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