Study Materials and Solutions for Students of class 8 only on Extramarks

In ICSE Biology Class 8 The heart is a pump, usually beating about 60 to 100 times a minute. With every heartbeat, the heart sends blood through our bodies, bringing oxygen to every cell. The blood returns to the heart after the delivery of oxygen. The heart then sends the blood to the lungs to get more oxygen. This cycle is repeated over and over again.
The circulatory system consists of blood vessels that carry blood away from and to the heart. The arteries carry blood away from the heart and the veins bring blood back to the heart.
The circulatory system carries oxygen, nutrients and hormones to the cells and removes waste products such as carbon dioxide. These roads only travel in one direction, to keep things going where they should be.The heart has four chambers— two on the top and two on the bottom: the two lower chambers are the right ventricle and the left ventricle. They pump blood out of the heart. There is a wall called the interventricular septum between the two ventricles.
The top two chambers are the atrium on the right and the atrium on the left.
They receive the blood that comes into their hearts.
The mitral valve separates the left atrium from the left atrium.
There are also two valves separating the ventricles from the large blood vessels carrying blood entering the heart: the pulmonary valve is situated between the right ventricle and the pulmonary artery carrying blood to the lungs.
The aortic valve is between the left ventricle and the aorta that carries blood to the body.
The ICSE Biology Class 8 study matter and solutions from Extramarks will help students in their studies and learning. Once students are done with the syllabus then they can start solving ICSE Class 8 Biology Question Paper to practice for their exams.