Cardiovascular System 1, Heart, Structure and Function

he cardiovascular system, often referred to as the circulatory system, is a complex network of organs and blood vessels that plays a crucial role in transporting oxygen, nutrients, hormones, and waste products throughout the body. At the center of this system is the heart, which serves as the pump responsible for circulating blood throughout the body. Here's a detailed description of the structure and function of the heart:

Structure of the Heart:
The heart is a muscular organ located in the chest cavity, slightly to the left of the midline. It is roughly the size of a closed fist and is composed of several key structures: