Biology
Fill in the blanks
- Our skeleton consists of bones, …………… and ……………
- …………… is the chief component of our skeleton.
- Shapewise the bones can be classified as …………… , …………… , …………… and …………… .
- The central hollow part of the long bones is known as …………… .
- A bone becomes soft and flexible when placed in dilute …………… .
Skeleton
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Answer
- Our skeleton consists of bones, cartilages and ligaments
- Bone is the chief component of our skeleton.
- Shapewise the bones can be classified as long, short, flat and irregular .
- The central hollow part of the long bones is known as bone marrow .
- A bone becomes soft and flexible when placed in dilute hydrochloric acid .
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Related Questions
Mention if the following statements are true (T) or false (F)
- Humerus of the upper arm is the longest bone.
- Axial skeleton includes shoulder and hip girdles.
- There are 10 vertebrae in the neck.
- There are three kinds of ribs - true, false and floating.
- The shoulder girdle is large and trough-shaped.
Mention if the following statements are true (T) or false (F).
- The flexor and extensor muscles of the arm are antagonistic muscles.
- Muscles can contract as well as elongate.
- Muscles are attached to bones by ligaments.
- Cardiac muscle is a voluntary muscle.
- Bending of arm on elbow is an example of first order of lever mechanism.
Match the bones (Column I) with the kind of joint (Column II)
Column I (Bones) Column II (Joint) Humerus and shoulder girdle Partially movable Two adjacent vertebrae Gliding Skull and upper end of the backbone Immovable Bones of brain box Ball and socket Rib and breast bone Pivot Your external ear (pinna) is supported by
- Bone
- Cartilage
- Tendon
- Capsule