Describe with figure about heart of frog.
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Heart of frog is three chambered. It is dark red colored conical muscular organ situated mid-ventrally in the anterior part of the body cavity in between two lungs.
The heart is enclosed in two membranes- an inner epicardium and outer pericardium.
The space between these two layers is called pericardial cavity. It is filled with pericardial fluid which performs :
- Protects the heart from mechanical injury.
- Keeps the heart moist
- Allows the free movement during beating.
- Also keeps in keeping the heart suspended in its proper position
Externally heart looks like a triangular structure. It is reddish color. It is 3 chambered besides sinus venosus and truncus arteriosus.
Its anterior end is broad and posterior end is somewhat pointed. The anterior broarder part is called auricles whereas the posterior part is called ventricles.
Auricles are two chambered: left and right auricles. These auricles are demarcated externally by very faint longitudinal interauricular groove. So it externally appears one.
Ventricle is single chambered. It is most important part of the heart. It is conical in shape with thick muscular walls. It is clearly separated from auricles by coronary sulcus.
Heart of frog consists of two additional chambers :
1- Sinus venosus- On the dorsal surface of heart, two precaval and a postcaval fused to form wide chamber called sinus venosus.
It is thin walled dark colored triangular structure which opens into the right auricle.
(It receives impure blood from all parts of the body and pours it into right auricle.)
2- Truncus arteriosus : It is a tubular structure arise from the right side of the ventricle is called truncus arteriosus. It extends forward over the right auricle and finally divides into two branches to form aortic trunks. Aortic trunk consists of- carotid arch, systemic arch and pulmonary arch.
Hope it helps !
Heart of frog is three chambered. It is dark red colored conical muscular organ situated mid-ventrally in the anterior part of the body cavity in between two lungs.
The heart is enclosed in two membranes- an inner epicardium and outer pericardium.
The space between these two layers is called pericardial cavity. It is filled with pericardial fluid which performs :
- Protects the heart from mechanical injury.
- Keeps the heart moist
- Allows the free movement during beating.
- Also keeps in keeping the heart suspended in its proper position
Externally heart looks like a triangular structure. It is reddish color. It is 3 chambered besides sinus venosus and truncus arteriosus.
Its anterior end is broad and posterior end is somewhat pointed. The anterior broarder part is called auricles whereas the posterior part is called ventricles.
Auricles are two chambered: left and right auricles. These auricles are demarcated externally by very faint longitudinal interauricular groove. So it externally appears one.
Ventricle is single chambered. It is most important part of the heart. It is conical in shape with thick muscular walls. It is clearly separated from auricles by coronary sulcus.
Heart of frog consists of two additional chambers :
1- Sinus venosus- On the dorsal surface of heart, two precaval and a postcaval fused to form wide chamber called sinus venosus.
It is thin walled dark colored triangular structure which opens into the right auricle.
(It receives impure blood from all parts of the body and pours it into right auricle.)
2- Truncus arteriosus : It is a tubular structure arise from the right side of the ventricle is called truncus arteriosus. It extends forward over the right auricle and finally divides into two branches to form aortic trunks. Aortic trunk consists of- carotid arch, systemic arch and pulmonary arch.
Hope it helps !
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