Provide a detailed account of the structure of the human heart and also discuss the nerve supply in the heart

### Structure of the Human Heart

The human heart is a vital organ that functions as a muscular pump, ensuring the continuous circulation of blood throughout the body. Its structure is intricately designed to facilitate this function, comprising several key components:

#### 1. External Anatomy

The heart is a hollow, cone-shaped organ located in the thoracic cavity, slightly to the left of the midline. It is encased in a protective sac called the pericardium, which consists of two layers: 

- Fibrous Pericardium: The outer, tough layer that provides protection and anchors the heart to surrounding structures.
- Serous Pericardium: The inner layer, which has two sub-layers:
  - Parietal Layer: Adheres to the fibrous pericardium.
  - Visceral Layer (Epicardium): Directly covers the heart's surface.

The space between these two serous layers, known ______ ________ _________ _______ ______ ____ ________ ________ ________.
______ ____ _____ __________ __________ ____ _____ ___ _____.
_________ ____ __________ ___ ______ ___ _____ __________ _____.
__________ ________ _____ ____ ___ ________.
______ ___ ________ __________ _________ ____ ________.
__________ _______ __________ __________ ___ _____ ___ ____ ________.
_____ ________ ____ __________ ______ ______.
__________ __________ _____ ______ ______ _________ _________ _______ ________ ____ ___.
____ __________ ___ ___ __________ ________ _________ __________ ___ _________ ________ ___.
____ _____ ________ _____ _______ ___ ________ _________.
____ ________ ________ _________ ____ ___ _________ ____ _________ ____.
_____ _____ ________ _____ _______ _________ ________ ______ _____ ______.
________ ____ __________ _________ ___ _____ ______ ________ _______ ________.
_____ _____ _________ __________ _____ ________ __________ __________.
_______ ______ ______ ______ _____ ______ _________ _________ ____ __________.
___ ______ ________ __________ _________ ____ ____.
____ __________ ____ _____ __________ __________ __________.
____ ___ _______ ________ ______ ____ _______ ____ ______.
____ ____ _________ _______ ____ _______ _________.
___ __________ __________ ____ ______ _____ ________ ____.
_____ ____ ____ ___ _________ ___.
_______ ___ _______ __________ ________ ____ ________.
____ ___ __________ ______ _______.
______ __________ _______ ___ _________ _____ ___ __________ ____ ____ ___ ________.
________ _____ _________ ______ ___.
___ __________ _______ _________ ____ ___ _________ __________ ______ ______.
___ ___ _______ _________ ________ __________ _____ _________ ______ _________ _____ _______.
________ ___ __________ __________ __________ _________ __________ _______.
______ ___ __________ __________ ___ ______ ____.
__________ ______ _____ ___ _________ ____ ______ ______ __________ _________ _______ ___.
______ _________ _________ __________ ___.
_____ _______ ______ ______ _______ ___ _________ _____.
_______ _____ _____ ____ ________ ____ ____.
___ __________ ____ _______ _________ ______ ___ _______ ___ ________ ______.
________ __________ ___ _________ _______ ___ ________ _______.
_________ _____ ____ ___ _____.
_________ __________ __________ _____ _______ _______ ______ ________.
_____ _________ _________ ___ _____ _____ _____ _____ __________.
________ ______ ________ ________ __________ ________.
__________ ________ _______ ________ __________ ______ ____.
___ ___ _______ ________ ___ _____ ________.
______ _____ ______ ______ _____ _____ ______ _______ _____ _________.
_______ ___ _____ ________ _____ _______ __________ __________ _________ _________ ________.
____ ______ _____ __________ ______ ___ _________ _____ ___ ____ ___.
______ _____ ___ ___ ______ ____ ________ _______ ________ _________ _______ _______.
_____ _____ ________ _________ _____ ______ _________ _______.
_____ _______ ________ _________ _________ ________ __________.
____ __________ ____ ________ ____ ___ _______ ____ _____.
_______ _______ ___ _________ ______.
________ _____ ___ __________ _________ ____ ______ __________.
___ ______ _____ _________ ______ _______ ________ ___ __________ ______.
______ ____ ___ _________ ________ _________ ______ ____ __________ ___.
________ _____ __________ _______ ___ _________ ____ __________ _______ _____ _________.
___ _________ ________ _______ ___ __________ _____ ____ _______ __________ __________.
_____ ___ _____ ________ ________ ___ _____ ________ _______ __________.
______ ____ _______ _____ __________ ___ ____ __________ ___.
____ ________ _____ _______ ______ _____.
________ _________ ____ _______ ____ ____.
___ ___ ______ _________ _______ ______ ____ ______ ______ __________ __________.
__________ ________ ________ _______ ___ ________ _____.
__________ _____ ___ ________ _____ _________ ________ ___ __________.
_______ __________ ________ ___ _______.
________ ______ ___ _______ _________.
_____ ___ _____ ___ ________ ______ ________ ______ _____.
_________ ________ __________ ______ ______ _______ ________ _____ ______ __________.
_____ _____ ________ ____ ______ _______ _____ ___.
_____ ______ _______ _______ ________ _______ _________.
___ ______ ___ _________ _________ _______ ___ ____ ______ ____.
__________ _____ _________ _______ _______ _______ _______ _____ _______ __________.
_______ ________ __________ _____ _________ __________ _____ __________ _________ ______ _______.
__________ ____ _________ _______ ________.
_____ _______ _____ ________ _____ ___ ______ ___ ___.
__________ _________ _____ ________ ___ _________ _____ ________ _____.
________ _________ _____ __________ _____ ________.
__________ _______ ____ ___ ____ _______ ___.
_____ _____ ______ _______ _________ ______ ________ __________ __________ ___.
____ ___ _______ _________ ___ __________ ________ _____ ___ ___.
_____ _______ _____ ___ _________ ____ _____ ___ _______.
_____ _________ _____ __________ _________ ______ ______.
__________ ________ ____ ___ ________ ____ __________ _____ _________ ___ ________.
______ __________ ____ _________ _________.
__________ _______ ___ _____.
Get Full Answer on WhatsApp