1. The human body By
Ela Cari Morris
Please click on
title to enter.

2. Click on any of the topics to read the information.
Main Menu
Click on any of the topics to read the information.
BRAIN
MUSCLES
VEINS
BLOOD
SKIN
HEART
BONES
BREATHING

3. Please press Hide Answer before going back to main menu
VEINS
Show answer
Hide answer
Why do veins look blue if blood is red?
Blood is ALWAYS red. Oxygen-rich blood is bright red as it leaves the heart. When it returns in veins without much oxygen, it’s still red, but it’s a deeper, darker red. But our veins look blue because blue light is reflected back to our eyes even though veins contain deep, dark red blood. Blue light does not penetrate human tissue as deeply as red light does. As a result, veins that are close to the surface of the skin will be more likely to reflect blue light back to the eye.
CLICK TO GO TO MAIN MENU

4. Please press Hide Answer before going back to main menu
BREATHING
Please press Hide Answer before going back to main menu
Facts
Questions
Show answer
Why do we breathe?
Hide answer
The fresh air in the countryside contains more oxygen than stale city air. This is because plants and trees of the forest take in carbon dioxide and give out oxygen all day long.
You breathe because you need oxygen to stay alive.
Show answer
Why do we need oxygen?
Hide answer
Your body needs oxygen to stay alive. When you breathe in, oxygen enters your lungs. They are designed to absorb as much oxygen as possible. The oxygen is absorbed into your bloodstream through your lungs and carried to every part of your body that needs it. Your cells need energy to live and work. When oxygen enters the cells the energy is released and the cells can function.
When you eat food, the energy is stored in the cells.
CLICK TO GO TO MAIN MENU

5. Please press Hide Answer before going back to main menu
SKIN
Please press Hide Answer before going back to main menu
Facts
Questions
Show answer
What is your skin?
Hide answer
The palms of your hands, your fingers and the soles of your feet are covered in minute ridges and grooves which make patterns. The pattern on your fingertips are unique to you – no-one else has the same pattern, (unless you’re twins!)
Your skin is the largest of the body’s organ. On average, an adult has about 2sq.m of skin.
Show answer
What does your skin do?
Hide answer
Your skin keeps your whole body together and does many other jobs as well;
It controls your body temperature
It is waterproof
It protects you from poisons, diseases and the sun’s ultra-violet rays
It feels heat and pain
It builds up Vitamin D to help you grow strong bones
It stores fat
It absorbs oxygen and releases carbon dioxide.
Within one square metre of your skin you have 4 metres of nervous, which take messages to the brain.
CLICK TO GO TO MAIN MENU

6. Please press Hide Answer before going back to main menu
BLOOD
Facts
Please press Hide Answer before going back to main menu
Questions
White blood cells are an important part of the body’s immune system. They defend against certain bacteria, viruses, cancer cells, infectious diseases and other unwanted materials.
Show answer
How much blood do you have in your body?
Hide answer
Blood makes up around 7% of the weight of a human body.
Show answer
What is blood donation?
Hide answer
Blood contains red blood cells, white blood cells and platelets.
Many generous humans around the world give blood donations every year. This blood is used in important blood transfusions or made into medication. There are strict rules that limit the number of people who can volunteer blood donations. These include checking for diseases that could be transmitted as well as ensuring recovery time for the donor’s body to replace its own blood.
CLICK TO GO TO MAIN MENU

7. Please press Hide Answer before going back to main menu
BONES
Please press Hide Answer before going back to main menu
How many bones do you have?
How can we protect
Our bones?
Show answer
Show answer
Hide answer
Hide answer
An average person has
206 bones.
Protect your skull by wearing a helmet for bike riding and other sports.
If you play sports like football or rugby, always wear all the right equipment.
Strengthen your skeleton by drinking milk and eating other dairy products. They all contain calcium, which helps bones harden and become strong.
Be active! Another way to strengthen your bones is through exercise like running, jumping, dancing, and playing sports.
CLICK TO GO TO MAIN MENU

8. Please press Hide Answer before going back to main menu
BRAIN
Please press Hide Answer before going back to main menu
The human brain is like a powerful computer. It stores our memory and controls how we as humans think and react. It has evolved over time and features some incredibly intricate parts that scientists still struggle to understand.
How heavy is our brain?
How big is our brain?
Show answer
Hide answer
Show answer
The human brain is over three times as big as the brain of other mammals that are of similar body size.
Hide answer
The brain of an adult human weighs around 3 pounds (1.5 kg). Although it makes up just 2% of the body's weight, it uses around 20% of its energy.
CLICK TO GO TO MAIN MENU

9. Please press Hide Answer before going back to main menu
MUSCLES
Please press Hide Answer before going back to main menu
How many muscles do you have?
Are there different types of muscles?
Show answer
Hide answer
Show answer
Hide answer
You have three different types of muscles in your body: smooth muscle, cardiac muscle, and skeletal muscle. Muscles are all made of the same material, a type of elastic tissue (sort of like the material in a rubber band). Thousands, or even tens of thousands, of small fibres make up each muscle.
Did you know you have more than 600 muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while others — like your heart — do their jobs without you thinking about them at all.
CLICK TO GO TO MAIN MENU

10. HEART What makes your heart happy? What is your heart made of?
Healthy food
Exercise
Not smoking
Keeping calm and relaxed
What is your heart made of?
Your heart is made of Arteries, Veins and Muscle.
Where does the heart live?
The heart lives on the left side of the chest, under the breast bone.
How big is your HEART?
Your fist is the same size as your heart.
CLICK TO GO TO MAIN MENU

11. Electricity going through your heart makes the muscle cells contract.
Blood that leaves the heart is carried through arteries. The main artery leaving the left ventricle is the aorta while the main artery leaving the right ventricle is the pulmonary artery.
The study of the human heart and its various disorders is known as cardiology.
Electricity going through your heart makes the muscle cells contract.
The heart is made up of four chambers, the left atrium, right atrium, left ventricle and right ventricle.
The heart is one of the most important organs in the human body, continuously pumping blood around our body through blood vessels.
You might have felt your own heart beating, this is known as the cardiac cycle. When your heart contracts it makes the chambers smaller and when your heart relaxes again the chambers get bigger and are filled with blood coming back into the heart
CLICK TO GO TO MAIN MENU