What is organ?

We have learnt that the simplest structure of living things is a cell. Look at to the Figure 1. A group of same cell that have similar structure and function together makes up tissue (Do you still remember, what the tissue is. You can check the video about tissue below). Tissues (more than one tissue) work together to perform a specific function as an organ. 

  Figure 1. What is organ

For example, look at the Figure 2.

What is this? Yes, this is skin. Skin is an organ. How do we know? Because skin is composed by tissues. Can you describe, what kinds of tissues are they?

  Figure 2. Skin is organ

These tissues (epidermis tissue, connective tisssue, nervous tissue and muscle tissue) makes up skin. So, what is the specific function they do? Skin function is protect the outermost part of body.

 

Okey, another example. Look at the Figure 3.

What is this? Yes, this is Bone. Bone is an organ. How do we know? Because Bone is composed by tissues. Can you describe, what kinds of tissues are they?

  Figure 3. Bone is organ

These tissues (connective tisssues) makes up bone. So, what is the specific function they do? Bone function is support the body movement.
 

So, what do you think about the figure below. Are they organs?  

Video about Tissue

Video tentang Jaringan