BLOOD CLOTTING

-

 The basic definitions and working of heart are covered in other page 



BLOOD  CLOTTING


When a tissue is wounded or a blood vessel is ruptured due to some injury the blood flows through it.


 If not checked it may cause an excessive loss of blood. Sometimes this immense loss of blood even leads to death. 


However the body has its own natural device of preventing the loss of blood by forming a blood clot which heals blood cell injury and stops flow of blood and also checks the entry of pathogenic microorganisms. 


This complex process is initiated by PLATELETS which circulates within blood around the body.

 


Mechanism of blood clotting 


In the region of injury, the platelets get ruptured and release a substance called thromboplastin .


 It converts protein prothrombin into thrombin.


 Vitamin K is essential for formation of thrombin in liver.

THROMBIN then changes soluble fibrinogen protein into fibrin(insoluble). This latter goes Rapid polymerisation to form long fibres the fibres form a network over damaged region to form blood clot.

 

                                                                     

Comments

Post a Comment

Popular posts from this blog

TRANSPORTATION IN ANIMALS ( DEFINITIONS AND FUNCTIONS ONLY)

-
Image
  (THIS PAGE CONTAINS DEFINITIONS AND FUNCTIONS OF CIRCULATORY SYSTEM ONLY FOR WORKING OF HEART REFER- https://yournotesparadise.blogspot.com/2021/08/transportation-in-animals-working-of.html ) For the food to be absorbed by each part of the body the digested food need to be transported to every location within the body !! TRANSPORTATION is a life process In which a substance synthesized observed in one part of the organism is carried to other parts of the body. TRANSPORTATION IN ANIMALS Before learning the mechanism involved in transportation, let us look at some basic terms to be used in transportation… Circulatory System : The circulatory system is responsible for transport of various substances  in human beings. It is composed of the heart, arteries, veins and blood capillaries. Blood plays the role of the carrier of substances. Heart: is a muscular organ; which is composed of cardiac muscles. It is so small that it can fit  inside and adult’s fist. The heart is a pumping organ wh
Read more

DIGESTION IN HUMAN BEINGS

-
Image
DIGESTION IN HUMANS (BY YASH) Humans are heterotrophic organisms , going deep into that they are omnivores ( feed on both plants and animals). Being Multicellular and having greater complexity They have a complex digestive system.  Their digestive system is made up of an alimentary canal and many digestive glands. There are five stages in human nutrition; Ingestion, Digestion, Absorption, Assimilation and Egestion. STRUCTURE AND FUNCTIONS OF ALIMENTRY CANAL AND RELATED DIGESTIVE GLANDS Alimentary canal has a long tube with muscular walls And extends to mouth to anal opening (anus).  It is about 9 Metre long tube in which several digestive glands open to secrete their respective digestive enzymes. The elementary Canal consists of following… MOUTH BUCCAL CAVITY PHARYNX OESOPHAGUS STOMACH SMALL INTESTINE LARGE INTESTINE 1.MOUTH It forms the uppermost opening of human digesti
Read more