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Solving time: 4 mins
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
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Text solution
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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 circulation | Closed system of circulation |
| In 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. |
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
P-wave | T-wave |
| 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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| Question Text | 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 |
| Updated On | Sep 26, 2022 |
| Topic | Body Fluids and Circulation |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 156 |
| Avg. Video Duration | 9 min |
