Ventricular contraction, Biology

Assignment Help:

The mitral valve has an anterior and a posterior cusp. The anterior cusp is larger and is attached on the upper right part of the margin of the left AV orifice. The posterior cusp is attached to the lower left part. The anterior cusp intervenes between the Mitral and Aortic orifices. There is, therefore, a forceful blood flow on both surfaces of this cusp. The papillary muscles connected to the cusp of the mitral valve are also called the anterior and posterior. These terms are misleading. The anterior papillary muscle arises from the sterno-costal wall of the ventricle near the lower end. The posterior papillary muscle arises from the diaphragmatic wall near its anterior end. The two muscles run backwards almost parallel to each other and their origins are close together. The chordae tendinae arising from these papillary muscles pass to the adjoining part of the two cusps of the mitral valve.

The mitral valve closes during ventricular contraction (systole) and thus prevents blood from flowing back into the left atrium.The papillary muscles and chordae prevent the valve cusps from prolapsing into the left atrium during systole.All components of the valve apparatus are essential for the proper functioning of the mitral valve.


Related Discussions:- Ventricular contraction

Explain bidirectional superior vena cavo, Explain Bidirectional Superior ve...

Explain Bidirectional Superior vena cavo pulmonary shunt bidirectional glenn "This is a palliative produce where blood from superior vena cava is diverted to the pulmonary arter

Acute heart failure, Ac ute heart failure The acute heart failure is c...

Ac ute heart failure The acute heart failure is characterized by sudden loss of consciousness and falling with or without convulsions. The mucous membranes become pale followe

Metamerism or segmentation, Metamerism oe Segmentation In the early c...

Metamerism oe Segmentation In the early coelomates the coelom was not divided into segments, the whole body cavity was a single space. Hence body movements were not precise.

State the term - halsted reitan varies, State the term - Halsted Reitan var...

State the term - Halsted Reitan varies with the particular test Scoring for the Halsted Reitan varies with the particular test, such that individual scores may be expressed in

Explain micronutrient deficiencies during kwashiorkor, Explain Micronutrien...

Explain Micronutrient deficiencies during kwashiorkor? Almost all the children manifest anaemia (due to iron deficiency) of some degree. Eye signs of vitamin A' deficiency are

What are synthetic auxins, What are synthetic auxins and what are their use...

What are synthetic auxins and what are their uses? Synthetic auxins, like indolebutyric acid (IBA) and naphthalenic acid (NAA) are substances same to IAA (a natural auxin) but

Antinutritional factors, Antinutritional factors Unconventional feed resou...

Antinutritional factors Unconventional feed resources including many agriculture by-products are rich in  antinutrients and toxic constituents, and tannins being the most widely o

By which term liverworts and mosses are characterized, Liverworts and mosse...

Liverworts and mosses are characterized by their lack of vascular conducting tissue. These two groups of liverwort, plants and mosses, are known by which of the below terms: a)

Explain the occurrence of vitamin B1, Explain the Occurrence of Vitamin B 1...

Explain the Occurrence of Vitamin B 1 Vitamin B 1   occurs widely in the vegetable  kingdom. The richest sources for vitamin B 1 , as you may already know, are yeast, grain ge

Describe a method of diagnosing diabetes mellitus, Q. In ancient Greece the...

Q. In ancient Greece the father of Medicine, Hypocrates, described a method of diagnosing diabetes mellitus by tasting the patient's urine. What is the physiological explanation fo

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