fissures in joist: natural or insect damge
The grooves in the second picture appear to be pitch pockets which are fairly common in softwoods and construction lumber.

The fact that the pockets contain a noticeable amount of resin may indicate that the lumber was not thoroughly dried (as is with most construction lumber). Fast or uneven drying is also likely to cause splits or cracks as wood shrinks and expands significantly depending on its moisture content. The possibility of these cracks, however, is usually accounted for in designs and most splits stop at the center of the beam. See here for details.