4.1 Lesson 4: Circulatory System Video Introduction

What is the primary function of the circulatory system?

• To produce blood cells

• To transport nutrients and oxygen to cells

• To fight infections

• To help the body move

What are the main components of the circulatory system?

• Heart, arteries, and veins

• Brain, spinal cord, and nerves

• Lungs, liver, and kidneys

• Stomach, intestines, and bladder

How long would the arteries and veins measure if placed end to end?

• Nearly 50,000 kilometers

• Approximately 10,000 kilometers

• Around 96,000 kilometers

• Over 100,000 kilometers

How many times does the heart beat per day?

• About 50,000 times

• Nearly 100,000 times

• Over 150,000 times

• Approximately 200,000 times

Where does the journey of blood start?

• In the brain

• In the lungs

• In the heart

• In the liver

What is the role of capillaries in the circulatory system?

• To pump blood

• To store blood

• To clean the blood

• To deliver oxygen and nutrients to cells

Why is physical exercise important for the circulatory system?

• It increases blood volume

• It ensures proper functioning of the system

• It helps in blood coagulation

• It slows down the heart rate

Which of the following is recommended for a healthy circulatory system?

• Spending more time in front of screens

• Avoiding all forms of exercise

• Eating more sugar and sweets

• Consuming vegetables, fruit, and fish