What is an organ system?
A group of organs that work together to perform a particular job.
What systems does the body have?
Digestive, respiratory, nervous, circulatory and skeletal.
What is the skeletal system?
Consist of bones that form the skeleton.
What are the functions of the skeletal system?
1. Supports the body and helps you move. 2. Some bones protect organs inside the body.
How many bones does the skeleton has?
206 bones
What does the skull protects?
Brain
What does protects the rib cage?
Heart and lungs
What is a joint?
It is the connection of bones that help us move.
Which joints move in all directions?
Hip joint and shoulder joint
Which joints move ONLY backward and forward?
Elbow joint and knee joint.
What is the function of the muscular system?
It works with the skeletal system to move the body.
Characteristics of the muscular system
1. Muscles are made of elastic tissue. 2. 650 muscles in human body. 3. That can be voluntary or involuntary.
What are involuntary muscles?
Muscles that we cannot control. They work even if we don't think about it.
Types of involuntary muscles:
Cardiac muscle and smooth muscle
Where can we find cardiac muscle?
Heart. It beats all day and night.
Where can we find smooth muscle?
Stomach. The digestion is not controlled by us.
