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Answer:
In stage 13, all four limb buds are present.
In stage 13, the upper limb buds resemble flippers.
In stage 23, the upper limb shows well-formed arm, elbow, wrist, and fingers.
In stage 23, the lower limb shows well-formed toes, feet, and knees.
Explanation:
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The limb development shows that in stage 13, all four limb buds are present and that the upper limb buds resemble flippers.
What is limb development?
Limb development simply means the formation of limbs in embryo due to the interaction between ectodermal and the mesodermal components of the limb buds.
In this case, in stage 23, the upper limb shows well-formed arm, elbow, wrist, and fingers and the lower limb shows well-formed toes, feet, and knees.
Learn more about limbs on:
https://brainly.com/question/6533776
