The document discusses the digestive, circulatory, respiratory, and excretory systems and their connection to nutrition. The digestive system breaks down food, the circulatory system transports nutrients through the body, the respiratory system provides oxygen, and the excretory system removes waste. Together these systems work in harmony to keep the body healthy by providing energy and nutrients from food and removing waste.

2. Nutrition

3. What do you think nutrition is?

4. Discover
Our bodies need energy to work. The energy we receive in
the form of food and drink is processed by the digestive
system. The respiratory system extracts oxygen from the
atmosphere and uses it to convert the nutrients into energy.
The circulatory system then transports this energy to different
parts of the body. Finally, the excretory system gets rid of
unwanted or toxic substances. The different systems all work
in harmony to keep us healthy. What two gases are involved
in breathing?

5. Mentimeter
1).Why is it important to eat well?
2).What are eating disorders and what can we do to avoid them?
3).Smoking and pollution are bad for us. What effects can they have on our body?
4).Why should we exercise regularly? How does it help our locomotor system?
How does it help our circulation ?
5).Why should we avoid drugs and alcohol? What effects can they have on our
bodies? What effects can they have on society?
6).Mens sana in corpore sano is a latin expression meaning “ a sound mind in a
sound body”. Do you agree the two go together?

6. The digestive, circulatory, respiratory, and excretory
system are all connected to nutrition. Fill in the following
blanks.
Digestive system
____Stomach__
____
_____________
______
_____________
______
Circulatory system
_______________
____
_______________
____
_______________
____
Respiratory system
_____________
______
_____________
______
_____________
______
Excretory system
_______________
____
_______________
____
_______________
____
Nutrition
Arteries, Lungs, Diaphragm,Heart, Small
intestine, Kidneys, Bladder, Veins,
Stomach, Pores, Trachea, Anus.

7. Digestive system
What is digestion? Digestion is the process in which food is broken down in your
stomach. Digestion allows your body to get the nutrients and energy it needs from
the food you eat.
Why is the digestive system so important for nutrition?

8. Word Bank
Rectum Large intestine
Oesophagus
Pancreas Small intestine
Stomach
Liver Mouth
Digestive system

9. Answers!

10. What are the steps of digestion? (research)

11. Steps of the digestive system
Step 1). Before we eat the food our mouths will salivate. This simply means they will
create “saliva” the liquid in your mouth. Salvia helps to break down the food, and
prepares it for digestion.
Step 2). Next the food travels through the “oesophagus”, which is a pipe that connects
your mouth to your stomach.
Step 3). The food then enters your stomach. The food is broken down further here by
acid and powerful enzymes. The food now travels to the small intestine.
Step 4). The small intestine is where most of the nutrients are absorbed. Here the food
is broken down even more by enzymes, as well as bile (gallbladder) from the liver.
Step 5). Finally our large intestine or “colon” is a 5-7 foot muscular tube that connects
the small intestine to the rectum. It is responsible for getting rid of our waste (poo.)