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Fish Heart
- Single Pass, Unidirectinal Pump
- 4 Chambers:
- Sinus Venosus, Atrium, Ventricle, Conus Arteriosus
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Fish Heart Chambers
- Sinus Venosus-
- thin walled sac
- Vein like
- Recieves deoxygenated blood-Common Cardinal and Hepatic Veins
- Sinoatrial Value
- Atrium -Thicker walls, Atrioventricular Valve
- Ventricle -Major Blood Pump, Thickest Walls
- Conus Arteriosus
- Semilunar Valves
- Extends Cranially as Ventral Aorta
- IN TELOSTS=BULBOUS ARTERIOSUS
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Amphibian Heart Number of Atrium and Ventricle
- Divided Atrium
- Single Ventricle
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Amphibian Heart Divided Atrium
- Divided Partially in LungFish
- Completly in Amphibians
- Right Atrium recieved DEOXYGENATED systemic blood
- Left Atrium recieves OXYGENATED pulmonary blood via pulmonary veins
- Atrial Walls have trabeculae (Muscular folds) that help to direct the blood
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Amphibian Heart: Single Ventricle
- Recieves both DEOXYGENATED AND OXYGENATED blood from right atrium and
- Trabecular arrangement of ventricular wall mostly keeps two bloods septerate
- Blood leave Ventricle via: Trucucs Arteriosus (Subdivided spiral valve), Right ventricle sends ventrally preferentially to pulmonary arteries, Left ventricle sends blood preferentially to head and rest of body
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Reptilian Heart
- Atrium:
- Completly divided in amphibian
- Ventricle:
- Incompletly divided in most reptiles
- Completly divided in cocodilians
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Turtle Heart- Atrium and Ventricle
- Right atrium recieves deoxygenated systemic blood
- Left atrium recieves oxygenated pulmonary blood
- Single Ventricle partly subdivided into left and right chambers
- Left side= cavum arteriosum
- Right side=cavum venosum
- Two sides connected by interventricular canal
- The right side of the ventricle is further separated by a muscular septum: formes the more central cavum pulmonale
- The Muscular flap serves as a one-way valve for the interventricular canal
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