Venous system, Biology

Assignment Help:

VENOUS SYSTEM

  1. It is collecting system formed by the uniting branches as smaller and then larger veins and venacava leading to the heart.
  2. Blood from anterior part of the body is returned to heart by two (in general mammals) anterior venacavae (or precavals), while from the posterior part by single posterior venacava (or postcaval).
  3. Human Heart receives blood only through two great veins: Superior vena cava from anterior part and inferior vena cava from posterior part.
  4. Precaval is formed by the union of common' Jugular vein, subclavian vein, intercostal vein and anterior azygos vein.
  5. The jugular veins as external and internal jugulars bring blood from head and neck. The right and left external jugulars are connected through jugular anastomosis. The subclavian vein brings blood from forelimbs and shoulder.
  6. A pair of pulmonary veins come from lungs and open by a common pore into left auricle.
  7. In posterior part the main vein is dorsal vein which leads to heart as postcaval. This is formed by the union of one renal vein from each kidney, one hepatic vein, gonadal veins and veins from hind limbs like sciatic and femoral veins.
  8. As speciality the venous system forms portal system in some parts of the body.

Related Discussions:- Venous system

What is organelles, What is Organelles? Organelles :   Eukaryotic cel...

What is Organelles? Organelles :   Eukaryotic cells contain various membrane-bound structures called organelles, in contrast to prokaryotes, which lack a definite internal or

Elaboration of yolk- reproduction, Normal 0 false false fal...

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

Types of blastula, TYPES OF BLASTULA - Blastulas are of following type ...

TYPES OF BLASTULA - Blastulas are of following type -                    1 .       STEREOBLASTULA - The blastocoel is very small. It's blastomere are less in num

Explain protein, What is protein? 1) Protein is a source of backup ener...

What is protein? 1) Protein is a source of backup energy that your body keeps, a large difficult molecule made up of one or more chains of amino acids. Proteins perform a wide

Ant species in the two regions, Calculate a 95% confidence interval for the...

Calculate a 95% confidence interval for the difference among the average numbers of ant species in the two regions. Compare your results to SPSS output and interpret the confidence

How do white cells differ from red cells, How do white cells differ from re...

How do white cells differ from red cells (a) In their structure, (b) Their function?   a) White cells have nuclei, red cells do not have nucle

Name the classes into which the phylum arthropoda is divided, What are the ...

What are the classes into which the phylum Arthropoda is divided? What are the three main ones and some of their representative species? The three major classes of arthropods a

What is loud p2 in second heart, What is Loud P2 in second heart? It oc...

What is Loud P2 in second heart? It occurs in pulmonary hypertension. In absence of pulmonary hypertension, it occurs when pulmonary trunk is dilated as in Ostium Secundum, ASD

Nutrition, define alimentary canal

define alimentary canal

Malarial disease, Malarial disease Malaria is a disease known since ...

Malarial disease Malaria is a disease known since ancient times almost from 5th century B.C. The word malaria actually means bad air. It was believed that malaria is c

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