Question 7 Write the differences between:
(a) Blood and Lymph
(b) Open and Closed system of circulation
(c) Systole and Diastole
(d) P-wave and T-wave
Class - XI - Biology Chapter Body Fluids and Circulation Page No. 289
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(a) Blood and Lymph
Lymph
Blood
It is a colourless fluid.It is red-coloured fluid.It contains plasma and lesser number of WBCs and platelets.It contains plasma, RBCs, WBCs, and platelets.It transports nutrients from the tissue cells to the blood, through lymphatic vessels.It transports nutrients and oxygen from one organ to another.It helps in body defence and is a part of the immune system.It helps in the circulation of oxygen and carbon dioxide.
(b) Open and Closed system of circulation
Open system of circulationClosed system of circulationIn this system, blood is pumped by the heart, through large vessels, into body cavities called sinuses.In this system, blood is pumped by the heart, through a closed network of vessels.The body tissues are in direct contact with blood.
The body tissues are in indirect contact with blood.
Blood flows at low pressure.Blood flows at high pressure.
Blood flow cannot be regulated.
Blood flow can be regulated
This is present in arthropods and molluscs.This is present in annelids, echinoderms, and vertebrates.
(c) Systole and Diastole
Systole
Diastole
It is the contraction of the heart chambers to drive blood into the aorta and the pulmonary artery.It is the relaxation of the heart chambers between two contractions.Systole decreases the volume of the heart chambers and forces the blood out of them.Diastole brings the heart chambers back into their original sizes to receive more blood
(d) P-wave and T-wave
Systole
Diastole
In an electrocardiogram (ECG), the P-wave indicates the activation of the Sino-atrial node.In an electrocardiogram (ECG), the T-wave represents ventricular relaxation.During this phase, the impulse of contraction is generated by the SA node, causing atrial depolarisation.During this phase, the ventricles relax and return to their normal state.It is of atrial origin.It is of ventricular origin.
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a) Blood:-
1) blood is a fluid connective tissue.
2) It is made up of plasma which constitute 55-60% and blood corpuscles or cells which is 40-45%.
lymph:-
1) When blood reached the capillaries some of the water and dissolved solutes are filtered out from the plasma into tissue spaces to form a tissue fluid called lymph.
2) Lymph has all the elements of the blood except erythrocytes and thrombocytes. It contains special type of leucocytes called lymphocytes.
b) Closed circulatory system:-
1) It is a system in which blood is closed at all times within vessels of different size and wall thickness.
2)Blood flows at a very high velocity
3) Eg:-molluscs
open circulatory system:-
1)It is a system in which blood flows through open spaces called lacunae and sinuses.
2) Blood flows at a very slow velocity
3) Eg:- human beings.
c) systole:-
1) A contraction is termed as systole.
2) The average pressure produced in the ventricles when they contract and pumps into aorta and pulmonary artery is called systolic pressure.
3) it is the upper limit of 120 Hg.
diastole:-
1) A relaxation is termed as diastole.
2) The average pressure produced when the ventricles get filled with blood from the auricles is called diastolic pressure.
3) it is the lower limit of 80 Hg.
d) P-wave:-
1) In an electrocardiogram (ECG), the Pwave indicates the activation of the SA node.
2)During this phase, the impulse of contraction is generated by the SA node, causing atrial depolarisation.
3) It is of atrial origin.
T- wave
1) In an electrocardiogram (ECG), the T-wave represents ventricular relaxation.
2)During this phase, the ventricles relax and return to their normal state.
3)It is of ventricular origin.
don't mind bcz uhh r in 11th n me in 8th so my answer is as per my grade bt I have tried to help uhh so
if my answer is correct then plzz mark it as brainliest.
1) blood is a fluid connective tissue.
2) It is made up of plasma which constitute 55-60% and blood corpuscles or cells which is 40-45%.
lymph:-
1) When blood reached the capillaries some of the water and dissolved solutes are filtered out from the plasma into tissue spaces to form a tissue fluid called lymph.
2) Lymph has all the elements of the blood except erythrocytes and thrombocytes. It contains special type of leucocytes called lymphocytes.
b) Closed circulatory system:-
1) It is a system in which blood is closed at all times within vessels of different size and wall thickness.
2)Blood flows at a very high velocity
3) Eg:-molluscs
open circulatory system:-
1)It is a system in which blood flows through open spaces called lacunae and sinuses.
2) Blood flows at a very slow velocity
3) Eg:- human beings.
c) systole:-
1) A contraction is termed as systole.
2) The average pressure produced in the ventricles when they contract and pumps into aorta and pulmonary artery is called systolic pressure.
3) it is the upper limit of 120 Hg.
diastole:-
1) A relaxation is termed as diastole.
2) The average pressure produced when the ventricles get filled with blood from the auricles is called diastolic pressure.
3) it is the lower limit of 80 Hg.
d) P-wave:-
1) In an electrocardiogram (ECG), the Pwave indicates the activation of the SA node.
2)During this phase, the impulse of contraction is generated by the SA node, causing atrial depolarisation.
3) It is of atrial origin.
T- wave
1) In an electrocardiogram (ECG), the T-wave represents ventricular relaxation.
2)During this phase, the ventricles relax and return to their normal state.
3)It is of ventricular origin.
don't mind bcz uhh r in 11th n me in 8th so my answer is as per my grade bt I have tried to help uhh so
if my answer is correct then plzz mark it as brainliest.
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