This is a good article. Follow the cellular respiration worksheet pdf for more information. This article is about the internal organ. Fis
This is a good article. Follow the cellular respiration worksheet pdf for more information.
This article is about the internal organ. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers. The upper part of the heart is located at the level of the third costal cartilage. The heart is cone-shaped, with its base positioned upwards and tapering down to the apex.
There is an ear-shaped structure in the upper right atrium called the right atrial appendage, or auricle, and another in the upper left atrium, the left atrial appendage. The cardiac skeleton also provides an important boundary in the heart’s electrical conduction system since collagen cannot conduct electricity. The interatrial septum separates the atria and the interventricular septum separates the ventricles. The interventricular septum is much thicker than the interatrial septum, since the ventricles need to generate greater pressure when they contract. With the atria and major vessels removed, all four valves are clearly visible. The heart, showing valves, arteries and veins.