HEART ANATOMY – NOTES WITH COLOR HEADINGS &
DIAGRAM
1. Definition
The heart is a muscular, hollow organ that pumps blood throughout the body. It works as a double
pump for systemic and pulmonary circulation.
2. Location
Located in the mediastinum, between lungs, slightly left tilted, resting on diaphragm, protected by
sternum and spine.
3. Size & Weight
About the size of a fist; weight 250–350 g.
4. Coverings of the Heart
Fibrous pericardium protects and anchors; Serous pericardium has parietal layer, visceral layer
(epicardium), and fluid-filled cavity.
5. Layers of the Heart
Epicardium (outer), Myocardium (muscular), Endocardium (inner smooth).
DIAGRAM
1. Definition
The heart is a muscular, hollow organ that pumps blood throughout the body. It works as a double
pump for systemic and pulmonary circulation.
2. Location
Located in the mediastinum, between lungs, slightly left tilted, resting on diaphragm, protected by
sternum and spine.
3. Size & Weight
About the size of a fist; weight 250–350 g.
4. Coverings of the Heart
Fibrous pericardium protects and anchors; Serous pericardium has parietal layer, visceral layer
(epicardium), and fluid-filled cavity.
5. Layers of the Heart
Epicardium (outer), Myocardium (muscular), Endocardium (inner smooth).
