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 an immunotoxin, Immunotoxin is formed by conjugating or combining a...

Immunotoxin is formed by conjugating or combining an antibody with highly toxic agent.

Define the term - stimulus, Define the term - Stimulus Stimulus and res...

Define the term - Stimulus Stimulus and response characteristics of the tests themselves, as well as of the test instructions, become exceedingly important considerations. In g

Ripening bananas, you tested three different treatments for ripening banana...

you tested three different treatments for ripening bananas. Before you did the lab, which one did you think would have ripened most? State your hypothesis and explain your reason

How is lymph propelled through the lymphatics, How is lymph propelled throu...

How is lymph propelled through the lymphatics? Some of the larger lymphatics are capable to contract, or else the lymph is propelled by body muscles which contract and 'squash'

What is polymerase chain reactionin genetics, What is Polymerase Chain Reac...

What is Polymerase Chain Reactionin genetics? A great advance in sequencing and cloning DNA is the polymerase chain reaction, devised by the American biochemist Kary Mullis in

Explain counseling children, Counseling children Assess the child's sta...

Counseling children Assess the child's stage of development. Adjust counseling for a child's  dependency needs,  lack of  experience and  the development tasks faced by  him

The cell membrane or plasma membrane ruptures, What happens when the cell m...

What happens when the cell membrane or plasma membrane ruptures or breaks down? When cell membrane ruptures Ions leek out and if not repaired in time the cell will die. As we k

Study of tonana larva, Study of tonana larva Tornaria larva is typical...

Study of tonana larva Tornaria larva is typical in the life-history of hemichordates. Examine the permanent slide and note the following features: I. The tornaria larva usu

Explain the groups of diabetes food pyramid, Explain the groups of diabetes...

Explain the groups of diabetes food pyramid The six groups of diabetes food pyramid are shown in Figure below. 1) Fat, oils and sweets (smallest group) 2) Milk 3) Mea

Explain about the cardiovascular disease and stroke, Explain the Cardiovasc...

Explain the Cardiovascular disease and stroke? Obesity may be an independent risk factor for coronary heart disease (CHD) with the degree of obesity being directly proportional

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