Question

Describe the structure of human heart.

Answer 1

Heya friend,

Heart is located in the thoracic cavity , in between the two lungs slightly tilted to the left.

It is derived from mesoderm and has the size of clenched fist,

Heart is protected by a double walled membranous bag called pericardium.
Pericardium consists of 2 layers ,outer parietal pericardium and an inner visceral pericardium attached to the heart.A space called pericardial cavity is present between two layers which is filled with fluid called pericardial fluid .

Pericardium protects the heart from shocks and mechanical injuries.

Our heart is divided into 4 chambers two relatively small chambers called atrium and two larger lower chambers called ventricles

The right and left atrium is separated by THIN muscular Interatrial  septum

The right and left ventricle  atrium is separated by THICK  muscular Interventricular  septum


So,Atrial are connected with ventricles ...atrial and atrial are not connected as well as ventricle and ventricle are not connected with each other


The heart has  valves(which prevents the back flow of the blood)
The mitral valve OR bicuspid(LOCATION:: LEFT ATRIUM AND LEFT VENTRICLE)valve 

Tricuspid valve(LOCATION: right atrium and left atrium)

The aortic valve and pulmonic valve are located between the ventricles and the major blood vessels leaving the heart.

hope this helps!!

Answer 2

Heart is located in the thoracic cavity , in between the two lungs slightly tilted to the left.

It is derived from mesoderm and has the size of clenched fist,

Heart is protected by a double walled membranous bag called pericardium.

Pericardium consists of 2 layers ,outer parietal pericardium and an inner visceral pericardium attached to the heart.A space called pericardial cavity is present between two layers which is filled with fluid called pericardial fluid .

Pericardium protects the heart from shocks and mechanical injuries.

Our heart is divided into 4 chambers two relatively small chambers called atrium and two larger lower chambers called ventricles

The right and left atrium is separated by THIN muscular Interatrial  septum