Advertisements
Advertisements
प्रश्न
Fill in the blanks of the following paragraph using just two words – arteries and veins.
___(a)___ carry oxygen-rich blood from the heart to all parts of the body and ___(b)___ carry carbon dioxide-rich blood from all parts of the body back to the heart. ___(c)___ have thin walls and ___(d)___ have thick elastic walls. Blood flows at high pressure in ___(e)___. Valves are present in ___(f)___ which allow blood to flow only towards the heart. ___(g)___ divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form ___(h)___.
Advertisements
उत्तर
Arteries carry oxygen-rich blood from the heart to all parts of the body and veins carry carbon dioxide-rich blood from all parts of the body back to the heart. veins have thin walls and arteries have thick elastic walls. Blood flows at high pressure in arteries. Valves are present in veins that allow blood to flow only towards the heart. arteries divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form veins.
APPEARS IN
संबंधित प्रश्न
Name of the valve between the left atrium and left ventricle and give its significance.
The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into the lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of the pumping organ. Contraction of chamber G forces the deoxygenated blood into the right lower chamber H. And finally, the contraction of chamber H sends the deoxygenated blood into the lungs through blood vessel I.
- What is organ A?
- Name the blood vessel (i) B (ii) E (iii) F, and (iv) I.
- What are chambers (i) C, and (ii) D?
- What are chambers (i) G and (ii) H?
Draw the diagram external features of the heart.
Complete the following sentence with appropriate word:
In man (human), the heart has _____ chambers.
Choose the Odd One Out:
The phase of contraction of heart is termed as ______.
Describe the structure and working of the human heart.
______ are muscular ridges at the inner surface of ventricles.
In human foetus, the heart begins to beat at developmental age of
When a person suffers from chest pain, the doctor immediately takes an ECG. Visit a doctor and get information about ECG. You may even look up an encyclopaedia or the internet.
