Coelom is absent in fasciola. Circulation occurs in space between internal walls. Its body contains a special tissue called parenchyma, which encloses a network of fluid filled spaces.

Hageman factor, along with high molecular weight kininogen, leads to the activation of Factor XI.

In this step, both the atria get filled with blood. The atrial systole takes about 0.1 second.

Due to the presence of a separate circulatory system, this system is insulated from pollutants, chemicals, and acidic and alkaline materials.

This is the study of blood vascular system including arteries, veins and heart.

They are alpha globulins which help in transport of copper.

They are red in colour due to the presence of haemoglobin and constitute 98-99% of the formed elements.

It is a translucent ice fish which is devoid of haemoglobin.

The approximate number of RBCs in human infants is 6 - 7 million per cubic mm.

The phenomenon of contraction of blood clot after a few minutes of its formation due to contraction of platelets attached to fibrin, leading to the expelling of serum, is called clot retraction.

It is the instrument which is used for counting erythrocytes.

They are the second largest component of plasma and constitute about 7% of the total plasma content. Plasma has about 70 types of proteins.

The phenomenon of having exceptionally high number of erythrocytes is called polycythemia.

Anaemia caused due to reduced life span of RBCs is called haemolytic anaemia.

Rouleax formation is present in RBCs. Cell coat and fibrinogen bring about temporary stacking of RBCs. It is called as rouleax.

Neutrophils are granulocytes which perform the function of phagocytic detoxification and protect the body against infection.

Basophils are granulocytes with irregular, S-shaped nuclei.

It is the rapid increase in the number of eosinophils due to worm infection and allergic disorders.

Thrombocytosis refers to the rise in platelet count above normal.

Lymphocytes produce antibodies for immobilising antigens and their toxins.