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प्रश्न
The help of a well-labelled diagram describes the internal structure of the human heart.
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उत्तर
Human heart has four chambers, two atria and two ventricles.
Atria:
Right atrium:
- Two atria are separated by a septum. The right atrium receives deoxygenated blood from upper part of the body by superior vena cava and inferior vena cava collects blood from he lower part of the body. Coronary sinus brings blood from the heart muscles.
- Eustachian valve guards the opening of inferior vena cava while the besian valve is present near the opening of coronary sinus.
- A dperession called fossa ovails is present on the right side of interatrial septum.
- Right atrium opens into right ventricle.
Left atrium:
- Oxygeneated blood from lungs comes here via pulmonary veins.
- Left atrium opens into left ventricle.
Ventricles:
- Ventricles are the distributing chambers which are separated by interventricular septum.
- Left ventricle has thickest wall as it pumps blood to all parts of the body.
- In the opening of right atrium into right ventricle, tricuspid valve (three flaps) is present which controls the transportation of blood from right atrium to right ventricle. Similarly bicuspid valve is present in between left atrium and left venticle. It is also known as mitral valve.
- These valves are attached to the ventricle by chorac tendineae, which prevents the back flow of blood.
From right ventricle: Pulmonary trunk carries deoxygenated blood to lungs for oxygenation.
From left ventricle: The aorta distributes oxygenated blood to all parts of the body. Pulmonary aorta and systematic aorta have three semilunar valves at the base which prevents back flow of blood.
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संबंधित प्रश्न
Foetus : Amnion : : Heart: ______
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?
Name the Following
The valve present between the left atrium and the left ventricle.
Give Technical Term for the following:
What is the approximate weight of the heart of a man?
State the Function: Bicuspid valve
In between which layers of pericardium, pericardial fluid is present?
A coronary sulcus is found ______
In ____________ of a mammalian heart O2 rich blood enter first.
The inner surface of the ventricle is thrown into series of irregular muscular ridges called ______
In the given figure of the heart which of the marked structures (1, 2, 3, 4, 5) carries oxygenated blood.
