Body Systems
What are the tiny building blocks of the human body?
Cells
What is the main function of the skeletal system?
To support and protect the body
What is an appendage?
A part attached to something larger (like arms or legs)
What do muscles do when they contract?
They shorten and cause movement
What does “interconnected” mean?
Connected or related to one another
What are organs made of?
Tissues
What are the three groups of bones in the axial skeleton?
Skull, spine, ribs
What is the longest bone in the human body?
The femur
What connects muscles to bones?
Tendons
What does “axial” mean in relation to bones?
Located along the center or axis of the body
What system helps the body breathe?
The respiratory system
What are the small bones in the spine called?
Vertebrae
What are the three types of joints?
Movable, immovable, and partially movable
What is the longest and strongest tendon in the body?
Achilles tendon
What does “appendicular” mean?
Bones attached to the main body, like arms and legs
What system pumps blood and carries oxygen?
The circulatory system
What fills the holes inside bones and makes blood cells?
Bone marrow
What tissue covers the ends of bones to prevent them from rubbing?
Cartilage
What are the three types of muscles?
Skeletal, smooth, and cardiac
What does “structure” mean?
The form or arrangement of parts that make up something
Why is the human body compared to a machine?
It’s made up of interconnected systems that work together like machine parts.
Why is it important for the ribs to have spaces between them?
So your chest can expand and contract when you breathe
What are ligaments and what do they do?
Tough, stretchy tissue that holds bones together at joints
What is the difference between voluntary and involuntary muscles?
Voluntary = controlled by choice; Involuntary = move automatically
What does involuntary mean? Give an example of this type of muscle.
It means “not” or “the opposite of” voluntary