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

Enterocoelous pattern – coelom, Enterocoelous pattern – Coelom In ent...

Enterocoelous pattern – Coelom In enterocoelous development of coelom the mesoderm arises in the embryo as paired lateral pouches growing out from the archenteron. The pouche

#organisation of the human bodytitle.., dhow is the structure of connective...

dhow is the structure of connective tisse linked to their function

Causes of malnutrition in inflammatory bowel disease, Q. Causes of Malnutri...

Q. Causes of Malnutrition in Inflammatory Bowel Disease? The causes of malnutrition include: • Decreased oral intake, which can be disease induced due to abdominal pain, dia

The effect of gravity on roots, The effect of gravity on roots Cut vari...

The effect of gravity on roots Cut various pieces of blotting paper about 8 cm square. Place these among two squares of glass. Place several radish or mustard seeds among the b

Phosphorylation, Phosphorylation is the addition of the phosphate monoeste...

Phosphorylation is the addition of the phosphate monoester to a macromolecule, catalyzed by a particular kinase enzyme. With respect to the proteins, particular amino acid side ch

Ecological adaptations in animals to desert environment, Ecological adaptat...

Ecological adaptations in animals to desert environment In response to scarcity of water, animats adcipt vario6s strategies to conserve or prevent loss of water. Most of the de

What are typical fauna of the tropical forests, What are the typical vegeta...

What are the typical vegetation and the typical fauna of the tropical forests? In the vegetation of a tropical forest broadleaf evergreen trees predominate. On the top of the t

Phylum protozoa, Classification of the phylum protozoa

Classification of the phylum protozoa

What phrase best describes oxidation- reduction reaction, What phrase best ...

What phrase best describes oxidation- reduction reaction? A. phosphoryrylation energezing endergounic reactions b. transferring of electrons from one molecule to another c. shar

What is passive transport , The passive transport of molecules across a me...

The passive transport of molecules across a membrane does not require an input of metabolic energy. Rate of the diffusion or transport is proportional to the concentration gradient

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