The human heart is a muscle that lies on the left of the chest. It is about the size of a fist. The heart is like a pump that sends blood around your body. Blood gives you the oxygen you need . An average heart pumps about 70 milliliters of blood into your body with every beat. That’s about 5 liters every minute or about 7200 liters every day.

Contents (14 pages)

• Introduction
• Parts of the heart
• Blood circulation
• Heartbeat
• Changing heart rates
• Heart attack
• How to keep your heart healthy
• Exercises
• Word list
• Key

Image: “Diagram of the human heart (clean)” by Wnauta is licensed under CC BY-SA 3.0.

Childhood obesity is a health issue that affects many young people in the world. About a third of all children in Europe and in the United States are overweight. This can lead to significant health problems when children get older.

Contents (15 pages)

• Introduction
• Who is at risk?
• The causes of childhood obesity
• Snacks and fast food
• Eating habits at home
• Delivery and circulation
• What childhood obesity can lead to
• Exercises
• Word list
• Key

Image: “Obesity in children” by Joe_13
is licensed under  CC BY-ND 2.0

Coffee is one of the most popular hot drinks in the world. Almost a third of the world’s population drinks coffee. People often meet at cafés or coffee shops for a coffee break during the middle of the morning or stop work in the afternoon to drink coffee.

Contents (21) pages)

• Introduction
• The coffee plant
• Harvesting and processing coffee
• How coffee is brewed
• History of coffee
• Types of coffee drinks
• Coffee production and consumption
• Exercises
• Word list
• Key

Image: Cup of espresso coffee, FreeSVG, Public Domain