--%>
Assignment Help - homework help

Valves of venous system

What can be said about the valves of the venous system and explain their functions?

E

Expert

Verified

The valves of venous system are structures which allow the blood to flow in normal way which is from the tissues upto the heart and forbid it to return in reverse way in favor of the gravity. The valves close down while the pressure of the fluid column above is higher as compared to the fluid pressure before them. Valves are thus primary in order to return the blood to the heart.

   Related Questions in Biology

  • Q : What is deplasmolysis of plant cells

    Deplasmolysis of plant cells: The plant cell when located beneath hypertonic medium loses a huge amount of water and its cell membrane detaches from cell wall. In that condition the cell is termed as plasmolysed cell. Whenever the plasmolysed cell is

    		•
  • Q : Factors affecting the degree of

    Factors affecting the degree of decentralization Nature of growth: if the enterprise has grown through internal expansion, it will continue to retai

    		•
  • Q : Endocrine and exocrine secretions Which

    Which pancreatic tissues are involved respectively in the endocrine and exocrine secretions? Specify their respective hormones and enzymes?

    		•
  • Q : Ureotelic and uricotelic excretions

    Considering the toxicity and the need for dilution in the water compare the ureotelic and the uricotelic excretions? Write some of the examples of animals which have these respective types of excretion?

    		•
  • Q : What is Cannibalism Explain why the

    Explain why the cannibalism is an inharmonious intra specific ecological interaction?

    		•
  • Q : What is endocrine function of placenta

    Explain, what is the endocrine function of placenta?

    		•
  • Q : What do you mean by Production Lead Time

    Production Lead Time: It is the time interval between the placement of a contract and receipt into supply system of materiel bought. Two entries are given: (i) Initial--The time interval when the item is not under production as of the date of contract

    		•
  • Q : How organism recognize that a clotting

    How does an organism recognize that a clotting process must start?

    		•
  • Q : Cell organelle comprised in cell

    Name the major cell organelle comprised in cell digestion? Describe the properties of that organelle which enable it to do the task?

    		•
  • Q : Population of secondary consumers of

    In short range what will take place to the levels below and above a population of secondary consumers of the numeric pyramid if a high number of individuals from this population die?

    		•