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Lymph circulatory system

Comparison of lymph and blood system: http://www.lymphnotes.com/article.php/id/150/

Short videos on lymph: http://www.nlm.nih.gov/medlineplus/ency/article/002247.htm

YouTube video on lymph system: http://www.youtube.com/watch?v=qTXTDqvPnRk

Composition of the lymphatic system

  • The lymphatic system is composed of lymph vessels, lymph nodes, and organs.
  • The organs associated with the lymphatic system are the spleen and thymus.
  • The spleen is the boundary between the blood and the lymphatic system.
  • Knots of lymphatic tissue in the spleen add lymphocytes to the blood.
  • The spleen also acts as a filter for the blood, and helps to destroy worn out red-blood cells.
  • In the event of damage to the spleen, it can be removed and its functions will be carried out by the liver, the bone marrow and the lymph nodes.
  • Most of the disease-fighting function of the adult mammal is carried out by the lymph nodes which occur along the lymph ducts.
  • Lymph nodes are small irregularly shaped masses through which lymph vessels flow.
  • Clusters of nodes occur in the armpits, groin, and neck.
  • Cells of the immune system line channels through the nodes and attack bacteria and viruses traveling in the lymph so they basically act as tiny filters.


  • Lymph vessels are located as a network throughout all tissues in the body.
  • Lymph vessels assist the circulatory system and all the cells of the body by removing wastes, germs and excess water from the tissue fluid.  
  • Lymph vessels carry lymph fluid in ONE direction only , from the bottom of the body up towards the heart.
  • Valves prevent the lymph fluid from flowing backwards.
  • Muscle contractions push the fluid upwards.

Functions of lymphatic system

The main functions of the lymphatic system are as follows:

  • the main function of the lymphatic system is to collect and transport tissue fluids from the intercellular spaces in all the tissues of the body, back to the veins in the blood system;
  • it plays an important role in returning plasma proteins to the bloodstream ;
  • digested fats are absorbed and then transported from the villi in the small intestine to the bloodstream via the lacteals and lymph vessels.
  • new lymphocytes are manufactured in the lymph nodes ;
  • antibodies and anti (manufactures in the lymph nodes) assist the body to build up an effective immunity to infectious diseases ;
  • lymph nodes play an important role in the defence mechanism of the body . They filter out micro-organisms (such as bacteria) and foreign substances such as toxins, etc.
  • it transports large molecular compounds (such as enzymes and hormones) from their manufactured sites to the bloodstream.

Youtube videos on lymph (External Link)

Relationship between blood system and lymphatic system

Table of comparison between the cardiovascular system and the lymphatic system

Cardiovascular System (Blood) Lymphatic System (Lymph)
Blood is responsible for collecting and distributing oxygen, nutrients and hormones to the tissues of entire body. Lymph is responsible for collecting and removing waste products left behind in the tissues.
Blood flows in the arteries, capillaries, and veins. Lymph flows in an open circuit from the tissues into lymphatic vessels.
Blood flows towards the heart and away from the heart Lymph flows in one direction only (towards the heart)
Blood is pumped by the heart to all parts of the body Lymph is not pumped. It passively flows from the tissues into the lymph capillaries.
Blood consists of the liquid plasma that transports the red and white blood cells and platelets. Lymph that has been filtered and is ready to return to the cardiovascular system is a clear or milky white fluid.
Blood is visible and damage to blood vessels causes obvious signs such as bleeding or bruising. Lymph is invisible and damage to the lymphatic system is difficult to detect until swelling occurs.
Blood is filtered by the kidneys. Lymph is filtered by lymph nodes located throughout the body..

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Comment on the ozone depletion over the period of 1982 to 1996
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Source:  OpenStax, Siyavula: life sciences grade 10. OpenStax CNX. Apr 11, 2012 Download for free at http://cnx.org/content/col11410/1.3
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