Circulatory system - blood vessels, Biology

Assignment Help:

BLOOD VESSELS -

  • Some vessles supply blood to wall of large vessels these are vessel of vessels or vasa vasorum.
  • Mainly artery and vein, 2 types of vessels present.
  • Third one is capillary - discovered by Marcillo Malpighi, thin, present in organ, only inner layer in wall present.
  • In man 10 billion capillaries present.
  • They may form 150,000 miles rope.
  • In vein blood flows mainly by contraction of body muscles & suction created by diastole of heart.
  • In wall of blood vessels 3 layers present.

1. Tunica Externa - Made up of connective tissue, collagen fibres present.

2. Tunica media - Thick, made up of smooth muscles arranged in circular way.

3. Tunica interna - Inner most layer. Outerly made up of yellow elastin fibre. Inner layer is of endothelial cells.

S.NO.

ARTERY

VEIN

1.

 

2.

 

 

 

3.

 

4.

 

5.

 

6.

 

7.

 

8.

 

9.

 

10.

Carry blood away from heart

 

Pure blood flows

 

(in pulmonary artery impure blood flows)

 

Blood flows with jerk

 

Blood flows with more pressure

 

Walls are thick

 

Lumen is narrow

 

Not collapse after death

 

Deeply placed

 

Valve absent

 

Wall firm

Towards heart

 

Impure blood flows

 

(In pulmonary vein pure blood flows)

 

Steady

 

Less pressure

 

Thin

 

Broad

 

Collapse

 

Superficially placed

 

Present to check back flow

 

Elastic


Related Discussions:- Circulatory system - blood vessels

What is the etiological agent of amebiasis, What is the etiological agent o...

What is the etiological agent of amebiasis? How is it transmitted and what are the typical manifestations of the disease? Amebiasis is caused by the protozoan Entamoeba histoly

Organic molecules, Organic Molecules Some organic molecules in life...

Organic Molecules Some organic molecules in life are Carbohydrates and Lipids à C, H and O Proteins à C, H, O, N & sometimes S Nucleic acids à C, H, O, N & P

Define nutrient and drug interaction, Define Nutrient and Drug Interaction?...

Define Nutrient and Drug Interaction? Modern medicine has given us many useful drugs that not only prolong and save lives but in fact improve the quality of our lives. Have you

How do keep respiratory system healthy, How do keep respiratory system heal...

How do keep respiratory system healthy? The circulatory system supplies food and oxygen to the body's cell. It carries away waste production of energy. The wastes must then be

What are the disadvantages of mucoperiosteal flap, What are the Disadvantag...

What are the Disadvantages of mucoperiosteal flap More traumatic - flap is raised  Sutures are required and the next procedure of impression is delayed till afterthe suture

Drugs for sexually transmitted infections, Drugs for Sexually Transmitted I...

Drugs for Sexually Transmitted Infections Many infections can be transmitted during sexual contact. The text and tables that follow are limited to management of sexually transm

The cerebrum, The cerebrum is clearly the most interesting part of the brai...

The cerebrum is clearly the most interesting part of the brain from the point of view of cognitive neuroscience. The cerebrum consists of highly symmetrical left and right hemisphe

Vapour theory - pre-mendelian theory, V apour Theory (i)         It wa...

V apour Theory (i)         It was proposed by a Greek philosopher Pythagoras in 500 B.C. (ii)         Each organ of an animal body emitted some kind of vapour and that a ne

Explain about cold preservation - methods of food processing, Explain about...

Explain about Cold Preservation - methods of food processing? The metabolism of a living tissue is a function of the temperature of the environment. Low temperatures are used t

Definition of old age, Definition of old age? The exact timing of the ...

Definition of old age? The exact timing of the onset of the ageing process cannot be ascertained because the effect of age varies among different individuals. However, the chr

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