Please Answer 72 and 73

 Please Answer 72 and 73 (e) hip and backbone 68. With winch Of the iollowing animals 'he term •slither' is asseKiated (c) fish (a) snake snail fish earthworm 70. Which one of the following when We straighten our arm ? both. biceps and triceps contract biceps and (c) biceps contracts but triceps relaxes (d) triceps contracts but biceps relaxes Questions Based on High Order Thinking Skills IHOTS) (d) earthworm snail 71. A. B and C some.' the parts Of 'he hut-nan skeleton, Part A is a long, hollow. encloses and protects the spinal cord. part B is at the top end Oi part A and it protects the brain the lower end A and forms two ball and socket joints With thigh bones. What are A, B 72. The upper arm bone a X and Y on its two sides. The are attached to the same fined bone called Z by tendorW •The lower ends Of both the are the bones oi lower by When the mus€le X contracts the muscle Y relaxes, then straightened. On the other hand. when t}u• muscle Y contracts and rnusae X relaxes, then the arm body (a) Name the muscle (i) X. Y. (b) What is the fixed bone Z. known as ? 73. The hip bone has two hollow spaces called p whereas upper ends of the thigh bones are round At our hip, the upper ends of two thigh bones fit into empty spaces to form joints Q. (a) What are the empty spaces P in hip bone known as ? (b) Wnat type oi join!s are Q ? (c) How does joint Q differ from a knee joint*