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प्रश्न
Why do people have a common belief that the heart is located on the left side of the chest?
Give reasons/explain:
People have a common belief that the heart is located on the left side of the chest.
उत्तर
People have a common belief that the heart is located on the left side of the chest because the narrow end of the roughly triangular heart is pointed to the left side. During its working, the heart's contraction is more powerful on the left side, which can be felt.
संबंधित प्रश्न
Explain Diapedesis.
Given below is certain structure, write the term for the functional activity.
Erythrocytes and …………………………………
The nearest organ to which the heart supplies oxygenated blood is:
Give reason, why a matured mammalian erythrocyte lacks nucleus and mitochondria?
Name the main parts of the circulatory system
Blood is produced in the bone marrow.
Identify the function of the erythropoietin hormone produced by kidney cells.
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
The valve which prevents back flow of blood in the veins and lymph vessels is ______.
Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:
 |
- Label the parts 1 and 4 indicated in the diagram.
- Which of the above mentioned number is the thickest artery? Also write its name.
- Mention the number and chamber of the heart which has the thickest muscular wall.
- Which of the above numbers/structures has the maximum number of blood capillaries?
- Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.
