We all should get ginnius award for visiting each and every youtube channel before attending exam...... (fun fact) : it only start at 24 hour before exam
The circulatory system consists of blood, blood vessels and heart. The heart is the central organ for pumping the blood throughout the body. Right upper atrium receives deoxygenated blood from whole body which is pumped into right ventricle Right ventricle sends blood to lungs for oxygenation by a pulmonary artery. After oxygenation blood travels through pulmonary veins and is received in left atrium which pumps it to left ventricle. Then it is pumped into aorta which is source of many arteries which carries oxygenated blood to different parts of body. Thank you Done by :sima karki Grade :8 Kathmandu, Nepal Just a short summary
Alsa right aurical contract and send deoxygenated blood to right ventricle while it is relaxed through tricuspid valve,and left auricle contract and send oxygenated blood to left ventricle while it is relaxed through bicuspid valve
Thanks a lot mam... 🥺🥺i dont know how can i thank you 🌹❤🙏... Fantastic teaching.. After a lots of confusion and now I m cleared... Now only I came to know how the heart works without any confusion 😵🥺🥺🥺
My friend - Who is greatest ? Me - The one who watches this type of video not before exams 😂😂 Anyway from my side ALL THE BEST and if you have more time than this is for you The human heart is a remarkable organ responsible for pumping blood throughout the body, providing oxygen and nutrients to cells and removing waste products. Here are some key points about the human heart: Anatomy: The heart is a muscular organ located slightly left of the center of the chest, between the lungs and behind the breastbone (sternum). It is roughly the size of a closed fist and weighs about 250 to 350 grams in adults. The heart is enclosed in a protective sac called the pericardium. Chambers: The heart is divided into four chambers - two atria (upper chambers) and two ventricles (lower chambers). The right atrium receives deoxygenated blood from the body and pumps it into the right ventricle. The right ventricle then pumps the blood to the lungs for oxygenation. Oxygenated blood returns to the left atrium, which then pumps it into the left ventricle. The left ventricle is responsible for pumping oxygenated blood to the rest of the body. Valves: The heart contains four valves that regulate blood flow and prevent backflow. The tricuspid valve separates the right atrium from the right ventricle, the pulmonary valve separates the right ventricle from the pulmonary artery, the mitral (or bicuspid) valve separates the left atrium from the left ventricle, and the aortic valve separates the left ventricle from the aorta. Circulation: The heart is part of the circulatory system, which comprises two main circuits - the pulmonary circulation and the systemic circulation. Pulmonary circulation is responsible for carrying deoxygenated blood from the heart to the lungs and returning oxygenated blood to the heart. Systemic circulation carries oxygenated blood from the heart to the rest of the body and returns deoxygenated blood to the heart. Electrical system: The heart has its own electrical system that controls the heartbeat. The sinoatrial (SA) node, located in the right atrium, acts as the heart's natural pacemaker, initiating electrical impulses that cause the heart muscles to contract. The electrical signals then travel through the atria to the atrioventricular (AV) node, which acts as a gatekeeper, delaying the signal before transmitting it to the ventricles. This delay ensures proper coordination between atrial and ventricular contractions. Heartbeat and cardiac cycle: The heartbeat is the rhythmic contraction and relaxation of the heart muscles. A complete cardiac cycle consists of two phases: systole (contraction) and diastole (relaxation). During systole, the heart contracts, pumping blood into the arteries. During diastole, the heart relaxes and fills with blood from the veins. Heart rate and rhythm: The normal resting heart rate for adults typically ranges from 60 to 100 beats per minute. The rhythm of the heartbeat is regulated by the electrical signals produced by the heart's natural pacemaker, but it can be influenced by factors such as emotions, physical activity, and hormonal changes. Blood supply to the heart: The heart itself needs a continuous supply of oxygenated blood to function properly. The coronary arteries are responsible for providing oxygen and nutrients to the heart muscles. In some cases, blockages in these arteries can lead to coronary heart disease or a heart attack. Heart health: Maintaining a healthy lifestyle through regular exercise, a balanced diet, managing stress, avoiding smoking, and controlling risk factors like high blood pressure and cholesterol levels are crucial for heart health. Regular medical checkups can help identify and address potential heart issues early. Heart diseases: Various conditions can affect the heart, including coronary artery disease, heart failure, arrhythmias, and valve disorders. These conditions can significantly impact heart function and require medical management and treatment. Remember, while I can provide general information, it is essential to consult a qualified healthcare professional for personalized advice and treatment regarding specific heart-related concerns.
Hello ma'am! I am a new student for you.. when you were giving the difference of arteries and veins I didn't got the very first point... I will be glad if you explain that to me.. Thank u!
Maam Can you clarify this. You said arteries have thin walls and veins thicker walls where as according to the ncert textbook (page no 73) it is the vice versa. Could you please provide the answer ASAP.
As the blood flow in atrium it pressure on heart this cause upper contraction and when it flows to ventricle it,the ventricle contract and atrium relax....
Alsa right aurical contract and send deoxygenated blood to right ventricle while it is relaxed through tricuspid valve,and left auricle contract and send oxygenated blood to left ventricle while it is relaxed through bicuspid valve
From past two days.. I was Very confused about this topic heart... I also watched some video but my confusion was not solves... But let me tell u maam that you have cleared all my doubts and confusion Thankyou so much
