Circulatory System Basics

Circulatory System Overview

• The circulatory system is a transport system that transports materials throughout the body.
• It transports materials to body cells and organs.

Functions of the Circulatory System

• Transports oxygen and nutrients to body cells.
• Transports carbon dioxide and metabolic waste to organs for disposal.

Components of the Circulatory System

• The circulatory system consists of three main parts: heart, blood vessels, and blood.

Heart Structure and Function

• The heart is a muscular organ that pumps blood.
• The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle.

Heart Chamber Functions

• The atria are receiving chambers.
• The ventricles are pumping chambers that create pressure to transport blood.

Blood Composition

• Blood consists of two main components: cellular and liquid components.

Circulatory System Divisions

• The circulatory system is divided into two parts: pulmonary and systemic.
• The pulmonary system receives deoxygenated blood and converts it into oxygenated blood through gas exchange.

Blood Flow

• Deoxygenated blood enters the right atrium and then flows into the right ventricle.
• From the right ventricle, blood is pumped into the pulmonary artery, where it is oxygenated.

Valve Function

• Valves in the heart ensure that blood flows in one direction and does not flow back into the atrium.