CrashCourse: Introduction to Joints

How many bones make up the adult human skeletal structure?

• 106

• 206

• 306

• 406

Besides bones, what other primary components make up the skeletal system?

• Muscles and tendons

• Nerves and blood vessels

• Cartilage and fibrous connective tissue

• Skin and hair

What is the definition of a joint in the human body?

• A place where muscles attach to bones

• A meeting place between two or more bones

• A structure that produces red blood cells

• A protective covering for organs

What term describes joints in the human body that do not move at all?

• Amphiarthroses

• Diarthroses

• Synarthroses

• Articulations

What are the three main structural classifications of joints?

• Fibrous, Cartilaginous, Synovial

• Hinge, Pivot, Ball-and-socket

• Plane, Condylar, Saddle

• Flexion, Extension, Abduction

Which type of joint connects bones with dense fibrous connective tissue and is mostly immovable?

• Cartilaginous joints

• Synovial joints

• Fibrous joints

• Hinge joints

What is the primary function of synovial fluid in a synovial joint?

• To provide structural support

• To connect bones directly

• To act as a lubricant

• To produce new bone cells

What type of movement decreases the angle of a joint, bringing two bones closer together?

• Extension

• Abduction

• Flexion

• Hyperextension