Cardiac muscles, Biology

Assignment Help:

CARDIAC MUSCLES -

  1. The cardiac muscles are found in the wall of the heart and in the wall of large veins (e.g., pulmonary veins and superior vena cava) where these veins enter the heart.
  2. These fibres show the characters of both unstriped and striped muscle fibres. Each fibre is a long and cylindrical structure which lacks a definite sarcolemma.
  3. The fibres are uninucleate and the nuclei lie near the centre.
  4. The fibres have some lateral branches, known as oblique bridges to form a contractile network.
  5. The myofibrils have transverse faint dark and light bands, which alternate with each other. In this way cardiac muscle fibres are also striped, but having dark intercalated discs at intervals.
  6. The intercalated discs are specialized regions of cell membrane of two adjacent fibres. The intercalated discs function as boosters of contraction wave and permit the wave of muscle contraction to be transmitted from one cardiac fibre to another.

656_cardiac muscles.png

UNIQUE FEATURES -

  1. Cardiac muscle fibres are supplied with both central and autonomic nervous system and are not under the control of the will of the animal.
  2. However, these muscles never get fatigued. Thus they are immune to fatigue.
  3. Blood capillaries penetrate the cardiac muscle fibres.
  4. They have very rich blood supply.
  5. They have the property of contraction, even when they are isolated from the body temporarily.

Related Discussions:- Cardiac muscles

Biometric computer security systems, By the technology development, the pri...

By the technology development, the price of computer has become lower and lower. For this reason, a majority of family can afford this technology. A large amount of applications so

Lab safety, Why should you not apply cosmetics while doing a lab experiment...

Why should you not apply cosmetics while doing a lab experiment in class?

Define human beings need energy for basal metabolism, Define human beings n...

Define human beings need energy For Basal metabolism? This comprises a series of functions that are essential for life, such as cell function and replacement; the synthesis, se

What are the three main limiting factors of photosynthesis, What are the th...

What are the three main limiting factors of photosynthesis? The three major limiting factors of photosynthesis process are light intensity, carbon dioxide concentration and tem

What are blood stem cells, What are blood stem cells? Stem cells are un...

What are blood stem cells? Stem cells are undifferentiated cells able to distinguish into other types of specialized cells. The stem cells of the bone marrow create the diff

Associated foods with escherichia coli, Q. Associated Foods with escherichi...

Q. Associated Foods with escherichia coli? Associated Foods: E. coli is the etiologic agent of food poisoning involves variety of foods such as cream pie, mashed potatoes, cr

Explain the conveyor (or band) dryers, Explain the Conveyor (or Band) Dryer...

Explain the Conveyor (or Band) Dryers? In the conveyor (or band) dryer, the product is distributed on a moving belt, typically of a perforated plate, that passes through a tunn

Biological conservation, what are the significance of zoological parks in c...

what are the significance of zoological parks in conversation

Culture negative endocarditis, In patients who have not received prior anti...

In patients who have not received prior antibiotics and who will ultimately have blood culture positive endocarditis, it is likely that 95 - 100 per cent of all cultures obtained w

Prolactin - vertebrates, Normal 0 false false false EN-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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