The Total solution for NCERT class 6-12
The differences are asfollows:
(a) Blood and Lymph
Lymph
Blood
It is a white tissue fluid
It is a red liquid connective tissue
Lymph flows in the lymph vessels
Blood flows in the blood vessels such as capillaries, arteries and veins
It contains white blood cells known as lymphocytes
Blood contains red blood cells, haemoglobin, platelets and white blood cells
The exchange of nutrients and gases between the blood and cells takes place through the lymph
Blood transports gases and other nutrients to the body.
(b) Open and Closedsystem of circulation
Open system of circulation
Closed system of circulation
Blood that is pumped by the heart passes through the large vessels into the open spaces or body cavities(sinuses)
Blood pumped by the heart flows via the closed network of the blood vessels
Blood flow is not regulated in this type of circulation
Blood flow is regulated by the valves in closed system of circulation
This circulation is slower and less efficient
This circulation is more rapid and efficient comparitively
Example – it is found in molluscs, arthropods
Example – it is found in chordates and annelids
(c) Systole and Diastole
Systole
Diastole
Systole is the contraction of the chambers of the heart
Diastole is the relaxation of the chambers of the heart
It causes an increase in the blood pressure within the heart
It causes the blood pressure to decline in the heart
Blood is pumped out of the chambers
Blood is received by the chambers
(d) P-wave and T-wave
P-wave
T-wave
P-wave depicts the depolarization or electrical excitation of the atria
T-wave depicts the repolarization of the ventricles
Blood is pumped into the ventricles
Blood is received by the atria