Olympiad Test: Body Movements - Class 6 MCQ

Hinge joint allows back and forth movement only. Bones in the knee, elbow, finger, and toes have hinge joint.

The skeletal system is the framework of bones that support our body and keeps it upright.

Skeletal system gives shape and support to our body. The backbone holds the body upright.

The ribs make a cage of bones around the chest called rib cage. The rib cage in humans protects the heart and lungs.

The bones in elbow have hinge joint that allows only back and forth movement.

- Earthworm: Earthworms move by contracting and expanding their body segments. They have circular and longitudinal muscles.
The correct answer is C: Earthworm.

• Insects belong to the group called arthropods, which are characterized by their jointed legs and segmented bodies.
• These jointed appendages allow insects to move efficiently and adapt to various environments.
• Other organisms listed, like snails, earthworms, and snakes, do not have jointed appendages; they use different methods for movement.
• For example, snails move using a muscular foot, while earthworms rely on contractions of their body segments.

Cockroach can walk, climb and can also fly in air. The muscles in the breast region move the legs for walking while another set of breast muscles move the wings during flying.

Ball and socket joint allows movement in many directions. The shoulder joint and hip joint are examples of ball and socket joint.

Skeletal and muscular system allow a human arm to bend and move.

The label X is a muscle while label T is a joint. Muscles move the joints by contraction and relaxation. On contraction, muscles get shorter and on relaxation, they get longer.

• Among the listed organisms, only the snake has a backbone.
• Snakes are classified as vertebrates, which means they have a spinal column made of vertebrae.
• Spiders and snails are invertebrates, lacking a backbone.
• Starfish, while having a hard structure, do not possess a backbone either.
• Understanding these classifications helps us learn about the diversity of life forms on Earth.

Backbone protects the spinal cord. It is made up of a series of small bones called vertebrae.

Fins help the fish to move in water. The forward movement of the fish starts with front and sideways push of the tail. The flexible and strong tail fin of the fish pushes the water and propels the fish forward.

These joints primarily allow for bending (flexion) and straightening (extension) movements, which can be thought of as stretching and folding movements.

Our muscles along with other body systems such as nervous system and circulatory system work together to move our bones.

Our shoulder has the ball and socket joint that allows circular movement. When you bowl while playing cricket, you rotate your hand in full circle.

• The skeletal system provides a framework for the body, supporting and protecting vital organs.
• Muscles are attached to bones via tendons, allowing for movement when muscles contract.
• This attachment enables the transfer of force from muscles to bones, facilitating motion such as walking, running, and lifting.
• Without these attachment points, muscles could not effectively move the body or maintain posture.

1. Knee: Bends to allow sitting, walking, and jumping (flexion).
2. Elbow: Bends to lift objects and perform tasks (flexion).
3. Neck: Bends to look around and check surroundings.

All these parts can bend, so the answer is d) All of these.

In the chart P is hinge joint and Q is ball and socket joint.