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

Define isolated soybean proteins in cereal products, Define isolated soybea...

Define isolated soybean proteins in Cereal products? ISP is sometimes used instead of, or in combination with isolates and soy flour, in the formulation of milk replacer mixtur

Explain risk factors for cad, Explain Risk Factors For CAD? As has been...

Explain Risk Factors For CAD? As has been noted, CAD is very common among the Indians and many studies have been undertaken to find out the reasons behind this predilection. Wh

Plants - rapidly flowing waters, Plants - Rapidly Flowing Waters Among...

Plants - Rapidly Flowing Waters Among the plants only small, well attached forms, such as sessile algae can survive here. Thus, due to the presence of only a few plants, the n

Explain ganongs potometer, For measuring the rate of transpiration of a twi...

For measuring the rate of transpiration of a twig using Ganong's potometer, learner A cuts the twig and fits it in the broad end of the water-filled potometer. Learner B cuts the t

Define carbohydrates needs in postoperative nutritional care, Define Carboh...

Define Carbohydrates needs in Postoperative Nutritional Care? Carbohydrates ensure the use of protein for tissue synthesis and energy required for increased metabolic demands.

Define reagents estimation of iron in the solution, Define Reagents Estimat...

Define Reagents Estimation of Iron in the Solution? 1. Conc. sulphuric acid (iron free) 2. Conc. potassium permanganate solution 3. Saturated potassium persulphate (K 2 S

Show some examples of migratory animals, Q. What are some examples of migra...

Q. What are some examples of migratory animals? Instance of the migratory animals are southern right whales from Antarctica, that procreate on the Brazilian coast; the migrator

Bioenergetics, role of bioenergetics in our body

role of bioenergetics in our body

What is the initial maintenance steps of implants, Initial Maintenance Step...

Initial Maintenance Steps of implants It is very essential, that from the beginning of the patient interaction regarding the implant therapy, through the diagnosis and planning

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