Jackfruit is a multiple fruit, many flowers whose fruits fuse during development into one fruit (usual example is the pineapple). Here are two units of the mature fruit. the central core is at the bottom. Two seeds each surrounded by their yellowish aril, a fleshy layer that is sweet and the part consumed. The sort of fibrous bits to the right in this image are undeveloped floral parts, the knobby rind is across the top.
Sorry about the reflections off the plastic wrap.