Haversian canals are found in

Which of the following cells in areolar tissue are phagocytic?

Histiocyte is a connective tissue cell,the function of which is:

Read the following statements and answer the question.
$(i)$ They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
$(ii)$ They support and protect softer tissues and organs.
$(iii)$ Osteocytes are present in the spaces called lacunae.
$(iv)$ They also interact with skeletal muscles attached to them to bring about movements.
Which of the following type of tissue is being described by above statements?

Elastic cartilage is found in

The Haversian canal contains $ \dots $.