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Here is the English translation of the previous answer:

a) The type of joint shown in the diagram is:

• Ball and socket joint

b) The parts labeled Z and U are:

• Z: Head of bone
• U: Cartilage

c) Two body parts where this type of joint is found are:

• Shoulder
• Hip

d) The functions of the fluid found in W (synovial fluid) are:

• It reduces friction between bones during movement.
• It absorbs shock and protects the cartilage.
• It provides nutrients to the cartilage.

e) The type of muscle found in the intestines is:

• Smooth muscles