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

Nutrition, type of nutrition in platypus and ant eater

type of nutrition in platypus and ant eater

Discuss the principle of osmolarity, These labs discuss the principle of os...

These labs discuss the principle of osmolarity, which is defined as the total number of solute particles in 1 L of solution. Is this the same thing as tonicity? Explain your answer

Define biochemistry, Biochemistry : The chemistry  of  living organisms ...

Biochemistry : The chemistry  of  living organisms that covers all  the chemical reactions occurring  in our body.

Cells, What physical and metaboloic constraints limit cell size?

What physical and metaboloic constraints limit cell size?

All part., Wat type of animal is tick and weevil?

Wat type of animal is tick and weevil?

Types of cardiac dopler, There are two types of Doppler examination: 1) ...

There are two types of Doppler examination: 1)  Pulse wave Doppler 2)  Continuous wave Doppler Both these modalities are necessary part of Doppler echocardiography and pro

Explain about the zinc toxicity, Explain about the Zinc Toxicity? Only ...

Explain about the Zinc Toxicity? Only a few occurrences of acute zinc poisoning have been reported. The toxicity signs are nausea, vomiting, diarrhoea, fever and lethargy and h

Fiehes test and aniline chloride test, Q. Fiehes test and Aniline chloride ...

Q. Fiehes test and Aniline chloride test? Determine the adulteration in the given honey sample by Fiehe's test and Aniline chloride test This activity will help you to: •

Cold chain system, Cold Chain System Vaccines are sensitive to heat. ...

Cold Chain System Vaccines are sensitive to heat. On exposure to heat their potency is lost. Once a vaccine has lost its potency it cannot be regained, so it is important

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