Learn: The Circulatory System

Welcome!Today we'll be exploring the circulatory system. This system is responsible for transporting blood, oxygen, and nutrients around the body. Let's dive in and learn how it works!

What is the circulatory system?The circulatory system is made up of the heart, blood, and blood vessels. It ensures that oxygen and nutrients reach all cells in the body while removing waste products like carbon dioxide.

The HeartThe heart is a muscular pump that keeps blood moving through the body. It has four chambers: the left atrium, right atrium, left ventricle, and right ventricle. It works continuously to circulate blood.

Blood VesselsThe circulatory system relies on three types of blood vessels: arteries, veins, and capillaries. Arteries carry blood away from the heart, veins carry blood back to the heart, and capillaries connect arteries and veins, allowing gas exchange with tissues.

Double CirculationHumans have a double circulatory system. This means blood passes through the heart twice: once to go to the lungs (pulmonary circulation) and once to go to the rest of the body (systemic circulation).

The Role of BloodBlood is made up of four components: red blood cells, white blood cells, platelets, and plasma. Each has a specific function, such as carrying oxygen, fighting infection, clotting wounds, or transporting nutrients.

Cardiovascular DiseaseCardiovascular disease refers to conditions affecting the heart and blood vessels, such as heart attacks or strokes. Risk factors include smoking, poor diet, lack of exercise, and genetic predisposition.

Review Time!Great work! You've learned about the circulatory system, its components, and how it functions. Let's test your understanding with a few final questions.