We all human do our daily activity such as working , eating , sleeping etc but how do we do that ? what organ is the responsible to do that? we all must have to learn about that. Actually the answer is HEART.

This is my last post for tonight and i want to describe about human heart . Everyone must have to know about heart.

Structure of Human Heart

The heart is present in the thoracic cavity in between the two lungs. two third of the heart is in left of the body and one third of heart is located in the right. the heart is the hollow muscular organ. the conical form of heart is called the apex of heart . it has apex and base . Heart is 5 incs length and 3.5 incs width. the heart is divided into 4 chamber , 2 upper and 2 lower. upper 2 chamber is called the atria and lower chamber is called ventricle. the right atria open the right ventricle by tricuspid valve and left atrium open by the bicuspid valve.
the atrium and ventricle is divided by septum . the apex of heart is attach with the lower lobe of left lung. so the lower lobe of left lung has a cardiac impression.

How the heart works?

In a human have 6 liters of blood which circulate in heart by pumping. at first the red blood cell (rbc) heading for the heart , the inferior vana cava where the journey starts from .
ex: now the O2 level is low cause gave it to the muscle by exercising then rbc reaches into the right atrium . superior vana cava drained the arms and head . now the blood goes to the right ventricle when tricuspid valve open. then right ventricle contracts and blood is headed to pulmonary artery to lungs. now the human is oxygenated by getting oxygenated blood .
then the blood flowing to the pulmonary vein to left atrium. left atrium sends the blood to through the left A-V valve to the left ventricle, which when it contracts. reached into the Aortic valves and then into the Aorta and then reaches any artery to any capillary and goes to the different circulatory system such as muscle brain, kidney, liver, bone, spleen. by this way heart found his oxygenated blood .

The heart could be stop because of lack of oxygen and or a blockage or direct injury to the heart. the conductive pathway have 4 nodes such as SA node , AV node , bundle of his and purkinje fibers. The SA node is called the pace maker of the heart . it is located in the right atrium. the AV node located into back wall of heart .

Now you can ask questions about blood ..

Blood contain fluid or liquid(plasma) . plasma is 90% water. it contains 3 main substances such as erythrocytes/red blood cell , leukocytes/white blood cell and thrombocytes/platelet.

what diseases could be occurs in a heart

coronary artery thrombosis, acute myocardium infarction, Heart failure, cardiomyopathy, peripheral vascular disease, rheumatic heart disease, valvulitis and congenital heart disease.

common symptoms of heart failure

Nowadays people die by heart failure . now it is the common source of death . now suggest some symptoms about heart failure. if those symptoms have appear you should hospitalization this patient . before heart failure the heart cant pump blood efficiently to meet the body's need . #swelling #shortness of breath #lightheartedness @fatigue @dizziness. these symptoms are causing heart failure. you must careful about these symptoms.

so from all above i discussed about heart is very important to know all person . As i am a medical student i should gives basic idea about the heart. good night and thank you.