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

Explain about the serum vitamin b12 assay, Explain about the Serum vitamin ...

Explain about the Serum vitamin B12 assay? Serum vitamin B 12 assay: The vitamin B 12 content of serum can be determined.  A serum level of 12 deficiency.

What kind of agent causes sars, Q. SARS is a disease that appeared in 2003 ...

Q. SARS is a disease that appeared in 2003 with epidemic features in the province of Guangdong, in east China. What kind of agent causes SARS? SARS is caused by a virus from th

Define working of kidney in excretion of zinc in humans, Define working of ...

Define working of Kidney in excretion of zinc in humans? Very small amount of zinc is excreted in the urine (0.3-0.7 mg/day), as most of the zinc filtered by the kidney is reab

Define estimation of blood thiamin levels - thiamin status, Define Estimati...

Define Estimation of Blood Thiamin Levels - Thiamin Status? The levels of free thiamin and its phosphoesters in whole blood and erythrocytes are measured using high- performanc

Regulation of glycogenesis, Regulation  of Glycogenesis Glycogen syntha...

Regulation  of Glycogenesis Glycogen synthase,  the key enzyme in glycogenesis, is activated by insulin and glucose and inhibited by CAMP.

Systolic dysfunction onset of symptoms, Q. Systolic dysfunction onset of sy...

Q. Systolic dysfunction onset of symptoms? In asymptomatic patients with normal LV function, the rate of progression to symptoms and/or LV Systolic dysfunction is about 4 per c

Explain the modes of ventilation, Explain the Modes of Ventilation? In ...

Explain the Modes of Ventilation? In general, mechanical ventilation can be done to deliver a set tidal volume (volume controlled) or a set pressure (pressure controlled). Some

Collection of blood, Collection of Blood It is a procedure done rout...

Collection of Blood It is a procedure done routinely for diagnosis. It can be done in various ways. 1) Capillary Sampling  The heel is the most useful area i

Organic molecules, Organic Molecules Some organic molecules in life...

Organic Molecules Some organic molecules in life are Carbohydrates and Lipids à C, H and O Proteins à C, H, O, N & sometimes S Nucleic acids à C, H, O, N & P

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