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

What are the uses of squid fins, What are the uses of squid fins? Fins ...

What are the uses of squid fins? Fins are used by squids to move at low speeds. Their siphon is used when they require moving quickly.

Illustrate about heart, Heart Heart is a cone shaped muscular structur...

Heart Heart is a cone shaped muscular structure situated between two lungs in the thoracic cavity. It is covered by a sac like structure known as pericardium which has two lay

What is the main theory opposed to evolution, What is the main theory oppos...

What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the description of how species emerged (phylogenesis) is fixism.

Define reflection - endodontic surgery, Define Reflection - Endodontic Surg...

Define Reflection - Endodontic Surgery -  Marginal gingival is very delicate and easily injured, therefore you should begin reflection of the vertical incision in the attached

What are the consequences of pem, What are the Consequences of PEM? Th...

What are the Consequences of PEM? The consequences of PEM are most often long lasting and irreversible. The common consequences include: • Irreversible growth retardation

Explain protostomes vs. deuterostomes breifly, Explain Protostomes vs. Deut...

Explain Protostomes vs. Deuterostomes breifly? Branching Evolutionary Lines : It appears that the Coelomate animals separated into two divergent lines of evolution in terms o

Explain trifluridine, Explain Trifluridine  (Viroptic)  Trifluridine is...

Explain Trifluridine  (Viroptic)  Trifluridine is a nucleoside analog active against herpes viruses, including acyclovir-resistant strains. Marketed in an ophthalmic preparatio

What is cloning, What is cloning? The Cloning is the making of an organ...

What is cloning? The Cloning is the making of an organism genetically identical to another by means of genetic engineering. The foundation of cloning is the nucleus transpla

Glycogen synthesis, To synthesize glycogen two enzymes are needed: 1.  U...

To synthesize glycogen two enzymes are needed: 1.  UDP-glucose   pyrophosphorylase catalyzes the synthesis of UDP-glucose from UTP and glucose 1-phosphate:   The   py

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