A.Give two example for the following . 1. Animals with streamlined bodies: _________,_________.2. Animals that do not have limbs:__________,_________.3. Parts of the human skeleton:_________,________. 4. Parts of the body with freely movable joints:_________,__________. 5. Parts of the body that have cartilage:__________,_________.
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Answers
Answer:
1.fishes, birds and snakes
2.extinct moa and elephant birds.
3.cervical, thoracic and lumbar vertebrae
4.Diarthroses
5.Joints between bones e.g. the elbows, knees and ankles. Ends of the ribs. Between the vertebrae in the spine.
Explanation:
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Answer:
1. Fishes, birds and snakes.
→ Presence of this kind of body shape is advantageous for their living. - For fishes streamlined bodies help them swim in water with the least possible resistance.
2. Whales and dolphins, sirenians, kiwis, and the extinct moa and elephant birds.
→ There are no known limbless species of mammal or bird, although partial limb-loss and reduction has occurred in several groups, including whales and dolphins, sirenians, kiwis, and the extinct moa and elephant birds.
3. Axial skeleton and Appendicular skeleton.
→ The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.
4. Ball & Socket Joint and Saddle Joint
→ Ball and socket joint – the rounded head of one bone sits within the cup of another, such as the hip joint or shoulder joint.
Saddle joint – this permits movement back and forth and from side to side, but does not allow rotation, such as the joint at the base of the thumb.
5. Joints between bones e.g. the elbows, knees and ankles. ; Ends of the ribs. ; Between the vertebrae in the spine. ; Ears and nose. ; Bronchial tubes or airways.
→ Cartilage is a connective tissue found in many areas of the body including:
- Joints between bones e.g. the elbows, knees and ankles.
- Ends of the ribs.
- Between the vertebrae in the spine.
- Ears and nose.
- Bronchial tubes or airways.
Step-by-step explanation: