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Short Answer Questions: Skeletal & Muscular System | Science Class 5 PDF Download

Q1: What is a bone, and how many bones are there in the adult human body?
Ans: A bone is a hard and tough tissue that makes up the body's skeleton. Adults have 206 bones in their bodies.


Q2: What are the main functions of bones in our body?
Ans: Bones provide shape and support to the body, protect our organs, and help us move.


Q3: Describe the structure of bones. What are they made of?
Ans: Bones are made of calcium, phosphorus, and a substance called collagen. They have a hard outer layer and a soft inner part. Bones can grow and repair themselves.


Q4: How are bones classified based on their size and shape?
Ans: Bones in our body differ in size and shape. They can be long (like those in limbs), short (like wrist and ankle bones), flat (like skull and breastbones), or irregular (like those in the hips and spine).


Q5: What is the skeletal system, and what are its main roles in the body?
Ans: The skeletal system is the central framework of the body, consisting of bones and connective tissues. Its main roles include providing shape and support, protecting organs, and enabling body movement.


Q6: Name the five main parts of the skeletal system and briefly explain their functions.
Ans: The five main parts of the skeletal system are the skull (protects the brain), vertebral column (supports the back and protects the spinal cord), ribcage (protects the heart and lungs), limbs (arms and legs for movement), and girdles (connect limbs to the body).


Q7: How many bones make up the human skull, and what is the function of the skull?
Ans: The human skull is made up of 22 bones. It gives shape to the face, houses the eyes, nose, ears, and mouth, and most importantly, it protects the brain.


Q8: Explain the types of joints found in the human body, and provide an example of each.
Ans: There are two kinds of joints: immovable joints (e.g., in the skull) and movable joints (e.g., in arms and legs). Movable joints further include hinge joints (e.g., knees), ball and socket joints (e.g., hips and shoulders), pivot joints (e.g., between the first and second vertebrae), and gliding joints (e.g., in wrists and ankles).


Q9: What is the function of cartilage, and where is it found in the body?
Ans: Cartilage is a strong and elastic tissue that protects bones from injury and provides flexibility. It is found in the nose and ears, making them soft and flexible.


Q10: How do muscles work with bones in the body, and what are the two types of muscles?
Ans: Muscles work with bones to enable movement. There are two types of muscles: voluntary muscles (under our control, like those in our arms and legs) and involuntary muscles (not under our control, like those in the stomach and heart). Muscles are made up of muscle fibers, which can be striated (skeletal), smooth (found in organs), or cardiac (found in the heart).

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