How far does each joint move?
"How far does each joint move?" is a free, interactive Class 11 Biology simulation for NEET, built on the NCERT section "Joints" in Locomotion and Movement. Drag the moving bone at each joint and the joint allows only its true range: none at a suture, a little between vertebrae (fibrocartilage), one plane at a hinge, rotation at a pivot, all directions at a ball and socket. NEET has asked about this idea 5 times in 10 years of papers.
From the lesson Joints in Locomotion and Movement. Change the values and watch what happens.
What it shows
NCERT §17.4
Drag the moving bone at each joint and the joint allows only its true range: none at a suture, a little between vertebrae (fibrocartilage), one plane at a hinge, rotation at a pivot, all directions at a ball and socket.
Controls
3 to try
- Segmentedsuture / intervertebral / knee / atlas–axis / shoulder / carpals / thumb
- Dragmoving bone
- Readoutdegrees of freedom
Try this
Find the two synovial joints that allow movement in more than one plane, and the joint that allows none.
Common mistake
Knee is a ball and socket joint; vertebral joints are fibrous.
In NEET
10 years of papers
Asked 5 times in 10 years of NEET.
See the past questions: Locomotion and Movement (chapter)
The idea behind it
NCERT §17.4
- A joint is a place where two bones meet, or a bone meets a cartilage; no bony part of the body can move without one.
- Muscles generate the force, and the joint acts as the fulcrum for the movement.
- By structure there are three kinds: fibrous, cartilaginous and synovial.
- Fibrous joints allow no movement. Example: the sutures, dense fibrous tissue joining the flat skull bones end to end to form the cranium.
- In cartilaginous joints the bones are held together by cartilage. Example: the joints between adjacent vertebrae, which permit limited movement.
- Synovial joints have a fluid-filled synovial cavity between the two articulating surfaces and allow considerable movement, so they matter most for locomotion.
- Synovial joint examples: ball and socket (humerus and pectoral girdle), hinge (knee), pivot (atlas and axis), gliding (between the carpals) and saddle (carpal and metacarpal of the thumb).
Questions
4 answers
- What does the "How far does each joint move?" simulation show?
- Drag the moving bone at each joint and the joint allows only its true range: none at a suture, a little between vertebrae (fibrocartilage), one plane at a hinge, rotation at a pivot, all directions at a ball and socket.
- What mistake does the "How far does each joint move?" simulation fix?
- A common mistake it clears up: knee is a ball and socket joint; vertebral joints are fibrous.
- Has NEET asked about this idea?
- Yes. NEET has asked about this idea 5 times in 10 years of papers.
- Is this simulation free?
- Yes. It is free and runs in the browser on a phone or a laptop. It belongs to the lesson "Joints" in Locomotion and Movement (Class 11 Biology).
Embed this simulation
Free, with a link back
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