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Q.
Centrum of 8th vertebra of frog is
Locomotion and Movement
Solution:
(i) Procoelous (Pro = front, coelous = cavity): Centrum is concave anteriorly
e.g.: — Typical vertebrae of frog (2 to 7) —Vertebrae of snakes and lizards
(ii) Amphicoelous (Amphi = both): Centrum is concave at both sides
e.g.: — 8th vertebra of frog
—Vertebrae of most fishes
(iii) Acoelous or Amphiplatyan (Platy = flat): Centrum is flat at both ends, without a concavity
e.g.: —9th vertebra of frog
—Vertebrae of mammals
(iv) . Heterocoelous (hetero = asymmetrical) : —The centrum is like a saddle
e.g.: —Vertebrae of birds