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Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5 PDF Download

Q1: Fill in the Blanks.


(i) The skeletal system is made up of _______ bones.
Ans: 
206
The human body consists of 206 bones that form the skeletal system.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

(ii) The smallest bones in the human body are found in the _______.
Ans: 
Ear (or Middle Ear)
The smallest bones in the human body, known as the ossicles, are found in the middle ear.

(iii) The place where two or more bones meet is called a _______.
Ans:
Joint
Joints are the points where two or more bones come together, allowing movement.

(iv) The strong, flexible tissue that covers the ends of bones at a joint is called _______.
Ans:
Cartilage
Cartilage is a smooth and flexible tissue that covers the ends of bones at joints to reduce friction during movement.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

(v) The muscles that we can control voluntarily are known as _______ muscles.
Ans:
Skeletal
Skeletal muscles are under our conscious control, and we can move them voluntarily.

Q2: Match the Column.


Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

Ans:
Femur - A
Cranium - B
Cardiac muscles - C
Ligaments - D
Tendons - E

Q3: Multiple Choice Questions (MCQ).


(i) Which of the following is not a function of the skeletal system?
(a) Providing support and shape to the body
(b) Protecting vital organs
(c) Producing red blood cells
(d) Transmitting nerve impulses

Ans: (d)
The skeletal system is responsible for providing support, protecting organs, and producing red blood cells, but it does not transmit nerve impulses.

(ii) Which type of muscles tire quickly and are found in the arms and legs?
(a) Cardiac muscles
(b) Smooth muscles
(c) Skeletal muscles
(d) Involuntary muscles

Ans: (c)
Skeletal muscles are attached to bones and are responsible for voluntary movements such as walking and lifting; however, they tire quickly compared to other muscle types.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

(iii) How many vertebrae are there in the human spine?
(a) 12
(b) 24
(c) 33
(d) 26

Ans: (c)
The human spine is made up of 33 vertebrae, which are divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal.

(iv) Which bone protects the heart and lungs?
(a) Femur
(b) Ribcage
(c) Humerus
(d) Skull

Ans: (b)
The ribcage, composed of ribs and the sternum, protects the heart and lungs by surrounding them.

(v) What is the main function of red blood cells?
(a) Fighting infections
(b) Transporting oxygen
(c) Carrying nutrients
(d) Regulating body temperature

Ans: (b)
Red blood cells are responsible for transporting oxygen from the lungs to all parts of the body and bringing back carbon dioxide to the lungs.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

Q4: True or False.


(i) The skull is a single bone that protects the brain.
Ans:
True
The skull is a single bone structure that encloses and protects the brain.

(ii) Cartilage is more rigid and less flexible than bones.
Ans:
False
Cartilage is more flexible and less rigid than bones, providing cushioning and support to specific areas of the body. 

(iii) Muscles can only pull and cannot push.
Ans:
True
Muscles can only contract and pull; they cannot push. Pushing actions are a result of the combined effort of different muscle groups.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

(iv) Ligaments are fibrous tissues that connect muscles to bones.
Ans: 
False
Ligaments are fibrous tissues that connect bone to bone, providing stability to the joints.

(v) The muscular system helps in maintaining body posture.
Ans: 
True
The muscular system plays a crucial role in maintaining body posture and supporting the body against gravity.

Q5: Short Answer Questions.


(i) What are the three types of muscles in the human body, and give an example of each?
Ans: 
The three types of muscles are:
(a) Skeletal muscles - Example: Biceps (in the arms)
(b) Smooth muscles - Example: Muscles in the digestive tract (stomach)
(c) Cardiac muscles - Example: Muscles in the heart

(ii) How do muscles work in pairs during movement?
Ans:
Muscles work in pairs during movement. When one muscle contracts (shortens) to produce movement, its opposite muscle relaxes (lengthens) to allow the movement to occur smoothly.

(iii) What is the role of the ribcage in protecting vital organs?
Ans: 
The ribcage forms a protective cage around the heart and lungs, shielding them from external impacts and injuries. It acts as a barrier against potential damage to these vital organs.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

(iv) Why is calcium important for the skeletal system?
Ans: 
Calcium is essential for the skeletal system because it helps in maintaining bone density and strength. It also plays a crucial role in the process of bone formation and repair.

(v) How does regular exercise benefit the muscular system?
Ans:
Regular exercise helps strengthen and tone muscles, improves their endurance, and enhances flexibility. It also promotes blood circulation, which ensures a steady supply of nutrients and oxygen to the muscles.
Worksheet Solutions: Skeletal & Muscular System - 2 | Science Class 5

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FAQs on Worksheet Solutions: Skeletal & Muscular System - 2 - Science Class 5

1. What are the main functions of the skeletal system?
Ans. The skeletal system serves several crucial functions, including providing support and structure to the body, protecting vital organs, facilitating movement through the attachment of muscles, producing blood cells in the bone marrow, and storing minerals such as calcium and phosphorus.
2. How do muscles and bones work together for movement?
Ans. Muscles and bones work together through a system of levers. When a muscle contracts, it pulls on the bone to which it is attached, creating movement at the joint. This interaction allows for a wide range of motion and enables various physical activities.
3. What are the different types of muscles in the human body?
Ans. The human body has three types of muscles: skeletal muscles, which are under voluntary control and enable movement; smooth muscles, which are involuntary and control functions such as digestion; and cardiac muscles, which are also involuntary and make up the heart, enabling it to pump blood.
4. What role does the axial skeleton play in the body?
Ans. The axial skeleton, which includes the skull, vertebral column, and rib cage, plays a vital role in protecting the brain and spinal cord, providing support for the body’s structure, and serving as an attachment point for muscles that facilitate movement.
5. How can one maintain healthy bones and muscles?
Ans. Maintaining healthy bones and muscles can be achieved through a balanced diet rich in calcium and vitamin D, regular weight-bearing exercises, staying hydrated, and avoiding smoking and excessive alcohol consumption, which can weaken bone density and muscle strength.
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