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

Chlorophyll, Chlorophyll is the pigment in the green plants which absorbs ...

Chlorophyll is the pigment in the green plants which absorbs solar energy.   chlorophyll a -  It is a green photosynthetic pigment common to all the photosynthetic organisms.

What are deciduous trees, What are deciduous trees? The Deciduous trees...

What are deciduous trees? The Deciduous trees are plants that lose their leaves in a period of the year and in the case of the deciduous trees of the temperate forest the fall

Find percentage of daughters body received first degree, The Jones family w...

The Jones family was caught in a fire but escaped. Unfortunately the father and daughter suffered burns. The father had second degree burns on his chest, abdomen, and both arms, an

Explain gastro-intestinal system, Explain G.I. (Gastro-Intestinal) system? ...

Explain G.I. (Gastro-Intestinal) system? A. Skeletal muscles directly control the movement of substances at the entrance of the G.I. system. B. Smooth muscles control the mo

Define japanese criteria for functional foods, Define Japanese criteria for...

Define Japanese criteria for functional foods? The Japanese criteria for functional foods include: They are food (not capsules, pills/powder) on the basis of naturally o

Show complications of mitral stenosis, Q. Show Complications of Mitral Sten...

Q. Show Complications of Mitral Stenosis ? Hemoptysis It is a common complication in patients with mitral stenosis and is related to the severity of mitral stenosis. Pulm

Explain the nutritional and functional role of zinc, Minerals  :-  Zinc ...

Minerals  :-  Zinc Food Source      Meats, cereals.  Nutritional Functional role Essential nutrient: Deficiency produces loss of appetite, growth retardation, skin

What the henderson-hasselbalch equation expresses, The Henderson-Hasselbalc...

The Henderson-Hasselbalch equation expresses the pH of a solution as: Select one: a. The equilibrium constant of the acid and the dissociated form of the weak acid. b. The

Causes of cancer, Causes of Cancer Scientists have identified the cellu...

Causes of Cancer Scientists have identified the cellular genes that code for those proteins which jointly control and regulate cell growth and division. These  genes are of two

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