Contractile cells, Biology

Assignment Help:

CONTRACTILE CELLS

In addition to above mentioned three types of muscular tissue, there are contractile cells.

These are as follows.

1.      Myoepithelial Cells (= Myoepitheliocytes). These cells are present in salivary glands, mammary glands and sweat glands. They form a sort of epithelium called myoepithelium. Myoepithelial cells contract to expel saliva, milk and sweat from the respective glands. Myopithelial cells are innervated by autonomic nerves. They resemble smooth muscle cells and are involuntary. These cells arise from the ectoderm instead of mesoderm.

2.      Myofibroblasts. These cells resemble fibroblasts but contain actin and myosin arranged as in smooth muscle and are contractile. In fact myofibroblasts are specialised contractile fibroblasts. The contraction of wounds is caused by the shortening of myofibroblasts.

3.      Pericytes. These cells are found around capillaries and venules. They contain actin and myosin. Pericytes can give rise to myofibroblasts and to mesenchymal tissue which can differentiate into fibroblasts and can form new blood vessels.


Related Discussions:- Contractile cells

Human respiratory system - bronchioles, BRONCHUS - In thorax trachea is...

BRONCHUS - In thorax trachea is devided in to 2 bronchi that enter into lungs of its own side. Rings present in it. BRONCHIOLES - These are branches of bronchus.

Agro industrial-mineral biofortification of plants, Mineral biofortificatio...

Mineral biofortification of plants One sustainable agricultural approach to reducing the mineral deficiencies in livestock animals is to enrich major staple food crops (rice,

Explain the kingdom fungi organisms, Explain the Kingdom Fungi organisms? ...

Explain the Kingdom Fungi organisms? Kingdom Fungi consists of mostly eukaryotic, multicellular, non-photosynthetic organisms that derive their nutrients by absorption. Fungi

What are the main cellular functions of potassium, What are the main cellul...

What are the main cellular functions of potassium? Besides being significant for the osmotic regulation and for the acid-base equilibrium (pH) potassium is basic for the excita

Why enzymes work to speed up a chemical reaction, Enzymes work to speed up ...

Enzymes work to speed up a chemical reaction by: a. attaching coenzymes to the substrate b. heating up the substrate c. lowering the activation energy of the reaction d. supplyi

What is bone remodeling, Bone Remodeling Bone remodeling differs from t...

Bone Remodeling Bone remodeling differs from the other means of bone structure alteration in that osteoblasts and Osteoclasts do not act independently but are coupled and bone

Biomaterials and osseointegration, During the last 90 years, man-made mater...

During the last 90 years, man-made materials and devices have been developed to replace parts of living systems in the human body. These special materials function in intimate cont

Define basic terminology in relation to nutritional needs, Define Basic Ter...

Define Basic Terminology in Relation to Nutritional Requirements? By now you would have a good understanding that nutrient requirements are affected by a number of factors and

How vitamin c play important role in the preventionof cancer, How Vitamin C...

How Vitamin C play important role in the preventionof Cancer? Vitamin C based on research evidence plays an important role in the prevention and treatment of cancer. Its anti c

Dietary recommendations during diarrhoea, Q. Dietary Recommendations during...

Q. Dietary Recommendations during Diarrhoea? The diet should take into account the normal RDI and various adjustments made to the quantity and quality of the foods to be given.

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