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

Marchantia , why vegetative reproduction use in marchantia

why vegetative reproduction use in marchantia

Explain the interaction of vitamin a with iron, Explain the interaction of ...

Explain the interaction of vitamin A with Iron? Iron: Iron status of an individual correlates with vitamin A. The deficiency of  vitamin A has been found to be associated with

Explain the eukaryotic gene expression , Explain the Eukaryotic Gene Expres...

Explain the Eukaryotic Gene Expression ? Eukaryotic cells regulate the transcription of individual genes, large parts of chromosomes, or even entire chromosomes. Gene expressi

What would most likely be true, You are given a metaphase chromosome prepar...

You are given a metaphase chromosome preparation (a slide) from an unknown organism that contains 12 chromosomes. Two that are clearly smaller than the rest appear identical in len

Determine the fransworth 100 hue panel test, Determine the Fransworth 100 H...

Determine the Fransworth 100 Hue Panel Test This is a simple and useful test using colour chips arranged in a particular sequence. Colour deficient patients make errors in arra

How is carbon dioxide released by cellular respiration, Q. How is carbon di...

Q. How is carbon dioxide released by cellular respiration transported from the tissues to be eliminated through the lungs? In vertebrates almost 70% of the carbon dioxide is ca

Protozoans, what are vhrmful effects of protozoans

what are vhrmful effects of protozoans

Acute rheumatic fever, Acute Rheumatic Fever   Rheumatic  fever is an i...

Acute Rheumatic Fever   Rheumatic  fever is an inflammatory disease that usually follows infection of upper respiratory tract with group A beta hemolytic streptococci. It  is c

Biologists established that new cells, Biologists established that new cell...

Biologists established that new cells Consequent to this doctrine, biologists established that new cells are formed by cell division and by the end of the nineteenth century, t

Name the food require during thyphoid, Food require during thyphoid So ...

Food require during thyphoid So remember the foods to be included are: Juices, soups, dal water, broths. Refined cereals and their products (e.g. maida, rava, bread, rice

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