Exploring the Musculoskeletal System for 7th Grade Science

This video tutorial provides an overview of the musculoskeletal system, focusing on bones, muscles, tendons, ligaments, and cartilage. It explains the structure and function of bones, including compact and spongy bone, and bone marrow. The tutorial describes the three types of muscles: skeletal, smooth, and cardiac, highlighting their roles and control mechanisms. It also covers the function of tendons and ligaments in connecting muscles to bones and bones to each other, respectively. The video concludes with a discussion on cartilage's role in joint protection and common injuries associated with it.

What is the primary function of compact bone?

• To cushion joints

• To provide structural density

• To produce blood cells

• To connect muscle to bone

Which type of muscle is controlled voluntarily?

• Skeletal muscle

• Smooth muscle

• None of the above

• Cardiac muscle

Where is smooth muscle primarily found?

• In the heart

• In the skin

• In the skeleton

• In internal organs

Which muscle type is found in the heart?

• Skeletal muscle

• Cardiac muscle

• Connective muscle

• Smooth muscle

What is the main role of tendons?

• To produce blood cells

• To connect bones to each other

• To connect muscles to bones

• To cushion joints

What injury is described when a ligament is partially torn?

• Strain

• Fracture

• Sprain

• Dislocation

Which ligament is located at the front of the knee?

• BCL

• ACL

• PCL

• MCL

What is the role of the ACL in the knee?

• To cushion the knee joint

• To connect the femur to the tibia

• To produce blood cells

• To connect muscle to bone

What is the primary function of cartilage in joints?

• To produce blood cells

• To connect bones to each other

• To connect muscles to bones

• To cushion and protect bones

What happens to cartilage when it is injured?

• It increases bone density

• It causes muscles to contract

• It does not heal on its own

• It regenerates quickly