Advertisements
Advertisements
प्रश्न
Write a short note on the human heart.
Advertisements
उत्तर
The heart is a pump that circulates blood to all parts of the body. It is about the size of a human fist and located to the left in chest cavity. It has four chambers – two upper chambers called auricles or atria and two lower chambers called ventricles. The auricles receive blood from different body parts and ventricles pump the blood out of the heart. The valves between auricle and ventricle on each side allow blood to flow in one direction only. Heart acts as a double pump. The right side of the heart carries deoxygenated blood to the lungs to be oxygenated. The left side of the heart pump oxygenated blood to the body.
APPEARS IN
संबंधित प्रश्न
Differentiate between LUBB and DUP (names of the valves whose closure produce the sound)
The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the questions which follow:
(i) Name the blood vessels labelled 1 and 2.
(ii) State the function of blood vessels labelled 5 and 8.
(iii) What is the importance of the blood vessel labelled 6?
(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(v) Draw a diagram of the different blood cells as seen in a smear of human blood.
Name the following:
The valve present in between the chambers on the right side of the human heart.
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
artery and vein (type of blood primarily flowing through)
What is Endothelium?
What is haemoglobin? State the consequences of deficiency of haemoglobin in our bodies.
Veins have valves at intervals in their inner lining whereas the arteries do not have valves. Explain.
Name the Following
Oxygen is transported by the blood in the form of
Which component of the haemoglobin molecule combines with the oxygen molecule to form oxyhaemoglobin?
Name the following:
Contraction phase of heart.
