Question

how are four Limbs connected to the spine​

Answer 1

Answer:

Each of the four limbs is made to the same basic pattern. It is joined to the spine by means of a flat, broad bone called a girdle and consists of one long upper bone, two long lower bones, several smaller bones in the wrist or ankle and five digits

Answer 2

Answer:

The upper limb and lower limbs were evolved basically for bearing the weight of the body and for locomotion. In quadrupeds forelimbs and hindlimbs are, therefore, built on the same basic pattern.

Each limb is made up of a basal segment or girdle, and a free part divided into Proximal

Nearer to the trunk. Shoulder is proximal and elbow is distal.

Away from the trunk.Shoulder is proximal and elbow is distal.

The girdle attaches the limb to the axial skeleton. The Distal Away from the trunk.Shoulder is proximal and elbow is distal.

However, with the evolution of the erect posture in man, the function of weight bearing was taken over entirely by the lower limbs. As a result of this the upper limbs and hands became free and gradually evolved into organs having great manipulative skill. This has become possible because of a wide range of mobility at the shoulder. Whole upper limb works as a jointed lever.

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Explanation:

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