1. Cells, tissues, organs and systems
Cells are the building blocks of life. A group of similar cells working together form a tissue. An organ is made up of different tissues working together. Organs working together form systems.

2. systems in the human body?
Can you name the
systems in the human body?
2 mins
The main systems in the human body are:
1. Circulatory
2. Respiratory
3. Nervous (CNS)
4. Urinary
5. Digestive
6. Skeletal (Skeleton)
7. Reproductive
8. Muscle

3. Cells, tissues, organs and systems
Basically, all living things are made up of cells…
A group of CELLS makes up a TISSUE
A group of TISSUES makes up an ORGAN
A group of ORGANS makes up a SYSTEM
A group of SYSTEMS make up an ORGANISM

4. Here’s another example in humans:
Muscle cells
Muscle tissue
Organ
System
Organism

5. Which system?
Nervous
Respiratory
Skeletal
Muscular

6. Digestive Urinary Respiratory Nervous
Which organs are connected to which system?
Use the torso to observe more clearly.
Digestive
Urinary
Kidneys
Bladder
Stomach
Intestines
Urethra
Liver
Pancreas
Respiratory
Nervous
Eyes, ears, nose, tongue and skin
Lungs
Heart
Brain