Maharashtra Board Textbook Solutions
Standard 6 – Science
Chapter 8 – Our Skeletal System and the Skin
✨ 1. Fill in the blanks with the proper word.
(a) The place where two or more bones are connected is called a ________.
Ans: A joint.
(b) Cells of the epidermis contain a pigment called ________.
Ans: Melanin.
(c) ________ and ________ are the two layers of the human skin.
Ans: Epidermis and dermis.
(d) The human skeletal system is divided into ________ parts.
Ans: Two parts.
🔗 2. Match the pairs.
| ‘A’ | ‘B’ |
|---|---|
| (1) Ball and socket joint | (c) Shoulder |
| (2) Hinge joint | (a) Knee |
| (3) Gliding joint | (b) Wrist |
✔️ 3. Right or wrong? If wrong, write the correct sentence.
(a) Bones are soft.
Ans: Wrong.
Correct Sentence: Bones are hard.
(b) The human skeleton protects the internal organs.
Ans: True.
✅ 4. Put a ✓ mark at the proper places.
(a) The _________ system gives a definite shape to our body.
- Excretory system
- Respiratory system
- ✅ Skeletal system
- Circulatory system
Ans: Skeletal system.
(b) The _________ joint is seen in fingers and toes.
- Hinge joint
- Ball and socket joint
- Immovable joint
- ✅ Gliding joint
Ans: Gliding joint.
✍️ 5. Answer the following questions in your own words.
(a) What are the functions of your skin?
Ans: The skin performs many important functions in our body:
- The skin protects the internal parts of the body such as bones, muscles, and organs.
- It helps to retain moisture in the body.
- It helps in the formation of Vitamin D in the presence of sunlight.
- It regulates body temperature by releasing sweat.
- It protects the body from heat and cold.
- It acts as a sense organ and helps us feel touch, heat, and cold.
(b) What should you do to keep your bones strong and healthy?
Ans: To keep our bones strong and healthy, we should eat a balanced diet rich in calcium, phosphorus, and Vitamin D. We should include milk, milk products, green leafy vegetables, fruits, eggs, and meat in our diet. Regular exercise like walking, cycling, and playing outdoor games also helps in strengthening the bones.
(c) What are the functions of the human skeletal system?
Ans: The human skeletal system performs the following functions:
- It supports the body.
- It gives shape to the body.
- It protects internal organs like the heart and brain.
- It helps in the movement of the body with the help of muscles.
- It stores minerals like calcium and phosphorus.
(d) Which are the various reasons due to which our bones might break?
Ans: Bones may break due to accidents or injuries. Falling from a height, collisions, or playing carelessly can cause fractures. In old age, bones become weak due to a lack of calcium and nutrients, which increases the chances of fractures.
(e) What are the different types of bones? How many types are there?
Ans: There are four main types of bones based on their shape:
- Long bones
- Short bones
- Flat bones
- Irregular bones
🤔 6. What will happen if?
(a) There are no joints in our body.
Ans: If there are no joints in our body, we will not be able to move. Our body will become stiff because bones cannot move without joints.
(b) There is no melanin pigment in our skin.
Ans: If there is no melanin in our skin, it will appear very pale or white. Our skin will not be protected from harmful sun rays, which can damage the body.
(c) Instead of 33 vertebrae, we had one single straight bone.
Ans: If we had one single straight bone instead of 33 vertebrae, we would not be able to bend, twist, or move properly. Our body would become stiff and inflexible.
🎨 7. Draw diagrams.
(a) Types of joints
6
(b) Structure of the skin
