Basic structure of heart, Biology

Assignment Help:

Basic Structure of Heart

The heart is small organ about the size of one's fist, located in the middle and slightly to the left of the mediastinum in the chest. The wider top part is the base and the blunt tip projecting forward and to the left if the apex. The heart is enclosed by the pericardium which is thick, fibrous and non-elastic. It consists of two layers: the inner layer-visceral layer and the outer parietal layer. The two pericardial surfaces are separated by a pericardial space that contains approximately 10-20 ml of thin, clear pericardial fluid which acts as a lubricant and reduces friction produced by the pumping action of the heart.

Epicardium-an epithelial single-celled layer surrounding the heart, the innermost layer of the pericardium. Myocardium is the actual heart muscle layer composed of striated muscle fibers. The myocardium is responsible for the energy created to eject a volume of blood. Therefore, it is thicker in the ventricles than in the atria. Endocardium is the inner layer and consists of endothelial tissue lining the entire interior of cardiac chambers and covers the heart valves.


Related Discussions:- Basic structure of heart

Biological diversity protection, Q. How can a great biological diversity pr...

Q. How can a great biological diversity protect an ecosystem from environmental damage? Why are less biodiverse ecosystems at risk of suffering deep biological harm if submitted to

How bone density affect osseointegration, How Bone density affect Osseointe...

How Bone density affect Osseointegration The most important bone property is density which is influenced by factors such as patient age and genetics. Higher density bones have

How are the antibodies against the rh factor formed, How are the antibodies...

How are the antibodies against the Rh factor formed? The Anti-Rh antibodies are made by humoral immune response. When the Rh- individual makes contact with the Rh factor this i

Write down a dna palindrome, Write a DNA palindrome or inverted repeat of a...

Write a DNA palindrome or inverted repeat of at least 10 nucleotides in length.

Peculiarities of mitosis - cleavage, Peculiarities of Mitosis - Cleavage ...

Peculiarities of Mitosis - Cleavage From the following you will learn that the mitosis in the phase of cleavage has some striking peculiarities: a) Synchronization of cell

Procedure for use microbiological laboratory equipment, Define Procedure fo...

Define Procedure for use Microbiological Laboratory Equipments? Now carry out this activity following the steps given herewith: 1. Observe each instrument (as mentioned abov

How is the smoothing tendency of cornea functioned, How is the smoothing te...

How is the smoothing tendency of cornea functioned? Smoothing tendency: In health and in disease condition the epitheliurm has a strong tendency to smoothen the underlyin

Identifications of a deficit by neuropsychological tests, Identifications o...

Identifications of a deficit by neuropsychological tests Ideometric approach and psychometric approach are the two methods that are used in the identification of deficits by ne

Explain about the obliques muscles, Explain about the Obliques muscles ...

Explain about the Obliques muscles The superior and inferior oblique muscles form an angle of about 51 0 with the optical axis. The oblique muscles produce cyclorotation becau

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