7,8 explain both questions...:
7. Which two bones in the given figure form a hinge joint ?
(a) I and II (b) I and III
(c) I and IV (d) II and III
8. Which one of the following pairs of structures is correctly matched with their correct descriptions ?
| Structures | Description |
| (a) Tibia and fibula | Both form parts of knee joint |
| (b) Cartilage and cornea | no blood supply but do require oxygen for respiratory need. |
| (c) Shoulder joint and elbow joint | ball and socket type of joint. |
| (d) Premolars and molars | 20 in all and 3 rooted. |
Dear student,
The answer of 7 is (b). In the given figure, Bone I is humerus and bone III is ulna. These together form a hinge joint at the elbow.
The answer of 8 is (b). Cartilage and cornea have no blood supply but do require oxygen for respiratory needs.The first option is incorrect because the knee joint is formed by three bones: the femur, tibia and the patella.The third is incorrect because shoulder joint is a ball and socket type of joint but elbow joint is a hinge joint.Fourth is incorrect because of all premolars and molars do not have three roots.
Regards.
The answer of 7 is (b). In the given figure, Bone I is humerus and bone III is ulna. These together form a hinge joint at the elbow.
The answer of 8 is (b). Cartilage and cornea have no blood supply but do require oxygen for respiratory needs.The first option is incorrect because the knee joint is formed by three bones: the femur, tibia and the patella.The third is incorrect because shoulder joint is a ball and socket type of joint but elbow joint is a hinge joint.Fourth is incorrect because of all premolars and molars do not have three roots.
Regards.