Kraujotakos sistema. Pristatymas anglų kalba
Biologijos skaidrės. Kraujotakos sistema. Prezentacija anglu kalba. The heart. Chambers and flow of blood in the heart. Chambers of heart. Flow of blood in the heart. Blood circulations. The blood vessels. Arteries. Veins. Connections between arteries and veins. Major arteries. Major veins. It is a muscular hollow organ that pumps the blood to various parts of the body. It is located in the mediastinum (the cavity between the lungs). It is surrounded by the pericardium. It is the right upper chamber of the heart which receives venous blood (deoxygenated) from whole body (through the superior vena cava, inferior vena cava, and the coronary sinus). During the interval when the ventricles are not contracting, blood passes down through the right atrio-ventricular orifice, guarded by the right atrio-ventricular (tricuspid) valve into the right ventricle. It is the left upper chamber of the heart which receives oxygenated blood from the lungs through. Pulmonary veins (. From each lung). When the left ventricle relaxes, blood passes through the left atrio-ventricular orifice, guarded by the left atrio-ventricular (mitral) valve into the left ventricle. The circulation of the blood can be distinguished into. Types of circulations, which are communicating together. These are.