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

Evolutionary Biology-Genetic Drift, Imagine a population evolving by geneti...

Imagine a population evolving by genetic drift in which the frequency of allele K is 0.65. What is the probability that at some point in the future allele K will drift to a frequen

How inadequate breast milk cause protein energy malnutrition, How Inadequat...

How Inadequate Breast Milk cause protein energy malnutrition? Though prolonged breastfeeding of children is the rule in US, the amount of breast milk secreted in poor Indian mo

Nutrients and the soil, Nutrients and the Soil Early experiments on mi...

Nutrients and the Soil Early experiments on mineral uptake were performed by Hoagland, Stout and Amon in 1923. They showed that minerals were taken up from the soil primarily

Explain antiarrhythmic drugs, Explain Antiarrhythmic Drugs? Amiodarone ...

Explain Antiarrhythmic Drugs? Amiodarone may be considered in VT/VF that is refractory to shock. It might be given if the third shock is not successful. The dose is 300 mg IV i

How to predict that a decrease in co2, Jennifer has the "stomach flu" that ...

Jennifer has the "stomach flu" that is going around campus and has been vomiting profusely for the past 24 hours. Not only has she been unable to keep down fluids or food but she h

Toxoplasma gondii - protozoan, Toxoplasma gondii Another well known Sp...

Toxoplasma gondii Another well known Sporozoan is Toxoplasma gondii which has an unusually wide host- range for n protozoan parasite. It can probably infect all warm-blooded a

Metamorphosis, Metamorphosis The phenomenon of metamorphosis is descri...

Metamorphosis The phenomenon of metamorphosis is described as a process during development which involves a remarkable change in morphology and physiology of the larva, so tha

Explain the glycemic index in chronic diseases, Explain the Glycemic index ...

Explain the Glycemic index in Chronic Diseases? In addition to serve as an aid in planning diets for diabetics, GI of diets has been linked to a number of chronic diseases. Sev

Syngamy, Syngamy The pollen tube grows to a very limited extent in the...

Syngamy The pollen tube grows to a very limited extent in the synergid. It releases the contents either through a terminal or a subterminal pore. The contents include the two

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