Write a brief note on the structure of heart.

Explanation

### Step-by-Step Text Solution on the Structure of the Heart

1. **Introduction to the Heart**:
The heart is a vital organ in the human body, primarily responsible for pumping blood throughout the circulatory system. It plays a crucial role in maintaining the flow of oxygen and nutrients to tissues and organs.

2. **Shape and Size**:
The heart is roughly the size of a human fist, which gives a good reference for its dimensions. Its shape is conical, with a pointed end (the apex) and a broader base.

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