The heart is a muscular organ located in the chest, slightly left of center. It is divided into four chambers - two upper auricles and two lower ventricles. The auricles fill with blood and the ventricles pump it out. There are four valves that help direct the flow of blood - the mitral and tricuspid valves between the auricles and ventricles, and the aortic and pulmonary valves in the arteries leaving the heart. The heart contracts and relaxes in systole and diastole to pump blood around the body via the circulatory system, with the left side pumping oxygenated blood through the greater circulation to the body and the right side pumping deoxygenated blood to the lungs through
The heart is a muscular organ located in the chest, slightly left of center. It is divided into four chambers - two upper auricles and two lower ventricles. The auricles fill with blood and the ventricles pump it out. There are four valves that help direct the flow of blood - the mitral and tricuspid valves between the auricles and ventricles, and the aortic and pulmonary valves in the arteries leaving the heart. The heart contracts and relaxes in systole and diastole to pump blood around the body via the circulatory system, with the left side pumping oxygenated blood through the greater circulation to the body and the right side pumping deoxygenated blood to the lungs through
77. CONCLUSIÓ Hem escollit aquest tema, ja que pensem que es molt interesant conèixer tot el procés de desenvolupament de l'embaràs, tots els canvis que es produeixen tant al fetus com a la mare. Vam decidir fer-ho des de la fecundació fins al part, per poder veure tot el procés i totes les parts que el componen.