🦴 Chapter 13: Skeletal System of Human Body

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1. Which of the following is a function of the skeletal and muscular system?

(a) It helps in movement and locomotion.

(b) It supports the body and protects internal organs.

(d) All of these

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2. The human skeletal system is mainly made of which tissues?

(a) Epithelial tissue

(b) Muscular tissue

(d) Nervous tissue

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3. The human skeleton is made of —

(a) Only bones

(b) Only cartilage

(d) None of these

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4. How many bones are there in the adult human body?

(a) 80

(b) 96

(d) 100

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5. Consider the following statements:

Q: At birth, humans have about 300 bones.

Answer: True

📘 Explanation: At birth, we have approximately 300 bones, many of which fuse to form 206 bones in adults

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6. Which bones form the upper limbs (forelimbs)?

(a) Radius

(b) Femur

(d) Humerus

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7. Which of the following statements is NOT true?

(a) Bones and muscles form organ systems

(b) Bones are formed from osteoblasts

(d) Cartilage is soft and flexible and found in ear, nose, etc.

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8. How many bones are joined in the chest (thoracic region)?

(a) 7

(b) 8

(d) 14

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9. What are "True Ribs"?

(a) First 7 pairs of ribs

(b) 8th and 9th pairs

(d) All of these

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10. What are "False Ribs"?

(a) 8th pair only

(b) 9th pair only

(d) All of these

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11. Which structure makes the rib cage?

(a) Thoracic vertebrae

(b) Sternum

(d) All of these

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13. How many bones are present in the facial region of the human skull?

(a) 22

(b) 8

(d) 14

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12. How many bones are found in the cranium (head region)?

(a) 22

(b) 8

(d) 1

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14. The smallest and largest bones are found in which part of the ear?

(a) Outer ear

(b) Middle ear

(d) All of these

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15. The U-shaped bone in English known as the Hyoid Bone is found in which part?

(a) Ear

(b) Hand

(d) Skull

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16. How many bones are present in the skull?

(a) 14

(b) 6

(d) 29

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17. How many bones are there in the vertebral column (spinal cord)?

(a) 30

(b) 33

(d) 26

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18. What is the name of the chest bone?

(a) Vertebra

(b) Clavicle

(d) Scapula

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19. Which of the following is NOT correct?

(a) Cervical vertebra – 7

(b) Thoracic vertebra – 12

(d) Sacrum vertebra – 3

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20. What is the first vertebra (C1) that connects to the occipital condyle
called?

(a) Atlas

(b) Craniovertebral

(d) Foramen

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21. Consider the following statements:

1. The largest and strongest bone of the human body is the femur (thigh bone).
2. The smallest bone is the stapes, found in the middle ear.

✅ Answer: (d) Both 1 and 2

📘 Explanation: Both statements are correct. Femur = longest, stapes = smallest.

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22. Which organ is mainly responsible for blood cell production?

✅ Answer: Bone marrow

📘 Explanation: Bone marrow is the soft tissue inside bones that produces red and white blood cells.

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23. Where are the clavicle and scapula bones located?

(a) Elbow

(b) Shoulder joint

(d) Both A and B

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24. What is the length of the longest bone (femur) in the human body?

(a) 32 cm

(b) 48 cm

(d) 120 cm

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25. Where is the tibia or shin bone found?

(a) Arm

(b) Hand (palm)

(d) Shoulder

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26. At the time of birth, which part of the body has fully developed bones?c

(a) Hands

(b) Neck

(d) Legs

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27. Which of the following is NOT a part of the appendicular skeleton?

(a) Human arm and leg bones

(b) Pelvic and pectoral girdle

(d) Hands and feet

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28. Where are phalanges (finger/toe bones) found?

(a) Only in fingers

(b) Only in toes

(d) Not in any

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29. What is the name of the flat bone that forms the front part of the knee
cap?

(a) Femur

(b) Scapula

(d) Patella

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30. Where is more cartilage found in the body?

(a) Larynx

(b) External ear

(d) All of these

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31. Which of the following is not part of the axial skeleton?

(a) Shoulder girdle

(b) Vertebral column

(d) Thoracic cage

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32. How many bones are there in the axial skeleton?

(a) 120

(b) 80

(d) 56

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33. What is the main reason for bone weakness in old age?

✅ Answer: Calcium and vitamin D deficiency

📘 Explanation: Lack of calcium and vitamin D leads to conditions like osteoporosis, causing bone weakening.

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34. How many bones are present in the forelimbs (arms) and hindlimbs (legs)?

(a) 90

(b) 120

(d) 204

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35. The bones in the human legs are –

(a) Hollow

(b) Porous

(d) Compact

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36. How many bones are there in the appendicular skeleton of a human?

(a) 80

(b) 120

(d) 206

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37. Which vitamin is required for proper bone development?

(a) Vitamin A

(b) Vitamin B

(d) Vitamin D

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38. Which disease is more likely caused by calcium and vitamin D deficiency?

✅ Answer: Rickets

📘 Explanation: Rickets leads to soft and weak bones, commonly in children due to vitamin D/calcium deficiency.

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39. Which condition is caused by an autoimmune reaction affecting joints?

(a) Osteomalacia

(b) Osteoarthritis

(d) Rheumatoid arthritis

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40. How many bones are there in the neck (cervical) region?

(a) 1

(b) 2

(d) 7

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41. What kind of joint is found between vertebrae?

(a) Immovable joint

(b) Slightly movable joint

(d) Freely movable joint

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42. What type of joint is the elbow and knee joint?

(a) Ball and Socket Joint

(b) Gliding Joint

(d) Pivot Joint

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44. Which bone in the pelvic girdle joins the ilium, ischium, and pubis and
connects to the femur?

(a) Pubis

(b) Ilium

(d) Collarbone

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43. Which of the following is NOT a bone of the forelimb?

(a) Humerus

(b) Radius

(d) Femur

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45. What type of joint is found in the wrist (carpus) and ankle?

(a) Ball and Socket

(b) Gliding

(d) Pivot

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46. The ribs are connected to the sternum through –

(a) Sternum

(b) Cartilage

(d) Spine

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47. Which part of the skeleton includes the ribs?

(a) Axial skeleton

(b) Appendicular skeleton

(d) None

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48. How many bones are found in the forelimbs?

(a) 30

(b) 60

(d) 130

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49. Consider the following statements:

1. The upper limb is connected to the axial skeleton via the pectoral girdle.
2. The lower limb is connected to the axial skeleton via the pelvic girdle.

✅ Answer: (d) Both 1 and 2

📘 Explanation: Both statements are correct. Pectoral girdle → arm, Pelvic girdle → leg.

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50. How many pairs of ribs are called false ribs?

(a) 8th to 9th pairs

(b) 7th to 8th pairs

(d) 11th to 12th pairs

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51. What is the study of the shape and structure of living things called?

(a) Morphology

(b) Anatomy

(d) Floriculture

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1. What is the part of the plant that remains underground called?

(a) Root system

Explanation: The underground part of the plant that absorbs water and anchors the plant is called the root system.

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2. What is the part of the plant that remains above the ground called?

Answer: (b) Shoot system

Explanation: The shoot system includes stems, leaves, flowers, and fruits — the aerial parts of the plant.

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🦴 Chapter 13: Skeletal System of Human Body

Control and Coordination in Plants and Human Body

Chapter 10:Excretion in Plants and Humans

Chapter 9:Transport in Plant and Human Body

Respiration in Plants and Humans

🧪 Biomolecules – Component of Food

🌿 Nutrition in Plants and Humans – Practice Questions

🧬 Biological Classification of Animal Kingdom

🌱 Chapter 4: Biological Classification of Plants

Micro-organism

🦴 Chapter 13: Skeletal System of Human Body