Lymphatic system, Biology

Assignment Help:

LYMPHATIC SYSTEM

  • As 'Middle man' of circulation it mediates exchange between blood and the tissue. It is also a collecting system like venous system.
  • Basically 'open type' circulation but also consists of thin walled lymphatic channels and lymphatic capillaries at some places.
  • Through out the body it is interwoven with blood vascular system except in the brain, spinal cord, cornea of eye and epidermis of skin.
  • 4% of plasma protein filter out into tissue fluid per hour and is returned to blood only by the lymphatic system.
  • Consists of lymph sinuses, lymphatic channels, lymph hearts, and lymph nodes with lymph.
  • A general defect of defense system due to the malfunctioning or disorders of lymphatic organs is called Hodgkins disease.
  • Lymph is the fluid which enters lymphatic capillaries from the tissue, it constitutes 25% of total body weight.
  • Contains all the essential Gomponents of blood except RBC and some large protein molecules, which cannot filter out through endothelial wall.
  • It is the part of tissue fluid which in turn, is the part of plasma. It stores gases, water, salts and waste products.
  • Baird Hastings called lymph as the "sea within us".
  • Lymphatic Channels are non contractile thin-walled structures with numerous valves to prevent back flow of lymph.
  • In mammals all these channels finally lead to the thoracic duct (left and right) which posteriorly dilates as cisterna chyli and anteriorly opens into sub-clavian veins.
  • In intestinal villi is called as lacteals and in spleen called as cords of BiIlroth.
  • Aggregated lymphatic tissue forms node-like structures in certain parts of the body mainly at joints, and thoracic and abdominal walls for the formation of W.B.C.
  • Lymph nodes are the compact aggregated mass of lymphoid tissue abundant in mammals, act as 'biological filter' to remove foreign bodies and worm out cells from body parts.
  • Called as Peyer's patches in intestinal wall and tonsils in pharyngeal wall.
  • Their larger versions are called as lymph organs/glands e.g. spleen, thymus etc.

1959_lymphatic system.png


Related Discussions:- Lymphatic system

Explain the genioglossus, Genioglossus Originates from superior genial ...

Genioglossus Originates from superior genial tubercles which are located near the crest of the alveolar ridge in atrophic mandible. Therefore, one should be aware of it during

What would be the knowledge of regeneration, A 19 year old model for Glamou...

A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid the injury will leave a scar. Based on your knowledge of rege

Subatomic Particles, We have end of semester exams coming up meaning that a...

We have end of semester exams coming up meaning that a majority of it will be over subatomic particles

Explain about diabetes mellitus, Explain about Diabetes mellitus Diabe...

Explain about Diabetes mellitus Diabetes mellitus (DM) has relation with all the systems of our body. With some systems it has direct relationship, while with others it has in

Explain simple sugar, Simple sugars are monosaccharides consisting of a si...

Simple sugars are monosaccharides consisting of a single polyhydroxy aldehyde or ketone unit. Their general formula is (CH 2 0) n (n=3 to 7).

Explain the toxicity of nicotinic acid, Explain the Toxicity of nicotinic a...

Explain the Toxicity of nicotinic acid? Although therapeutically useful in lowering serum cholesterol, administration of chronic high oral doses of nicotinic acid can lead to h

Volvox Colonial Existence, Necessity of interdependence of Volvox organisms...

Necessity of interdependence of Volvox organisms in the colonial existence

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

Oncogene, Oncogene is the gene in a tumor virus or in the cancerous cells ...

Oncogene is the gene in a tumor virus or in the cancerous cells which, when transferred into the other cells, can cause the transformation (note which only certain cells are susce

What are the five human digestive secretions, What are the five human diges...

What are the five human digestive secretions? Which of them is the only one that does not contain digestive enzymes? The human digestive secretions such as: saliva, gastric jui

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