Vascular Circuits Circulation – Cardiovascular System

 

Vascular Circuits Circulation – Cardiovascular System

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Vascular Circuits Circulation – Cardiovascular System

Vascular Circuits Circulation – Cardiovascular System

  • A. Schematic illustration of the anatomic arrangement of the two muscular pumps (right and left heart) serving the pulmonary and systemic circulations.
  • B. Schematic illustration of the body’s circulation, with the right and left heart depicted as two pumps in series. The pulmonary and systemic circulations are actually serial components of one continuous loop.
  • C. A more detailed schematic illustration demonstrating that the systemic circulation actually consists of many parallel circuits serving the various organs and regions of the body.

CARDIOVASCULAR SYSTEM

The circulatory system transports fluids throughout the body; it consists of the cardiovascular and lymphatic systems. The heart and blood vessels make up the blood transportation network, the cardiovascular system . Through this system, the heart pumps blood through the body’s vast system of blood vessels. The blood carries nutrients, oxygen, and waste products to and from the cells.

Vascular Circuits

The heart consists of two muscular pumps that, although adjacently located, act in series, dividing the circulation into two components: the pulmonary and systemic circulations or circuits. The right ventricle of the heart propels low-oxygen blood returning from the systemic circulation into the lungs via the pulmonary arteries . Carbon dioxide is exchanged for oxygen in the capillaries of the lungs, and then the oxygen-rich blood is returned via the pulmonary veins of the lungs to the heart’s left atrium . This circuit, from the right ventricle through the lungs to the left atrium, is the pulmonary circulation . The left ventricle propels the oxygen-rich blood returned to the heart from the pulmonary circulation through systemic arteries (the aorta and its branches), exchanging oxygen and nutrients for carbon dioxide in the remainder of the body’s capillaries. Low-oxygen blood returns to the heart’s right atrium via systemic veins (tributaries of the superior and inferior vena cavae). This circuit, from left ventricle to right atrium, is the systemic circulation .

Source: Clinically Oriented Anatomy

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