There was a nervous moment for Hartlepool keeper A Williams, who had already conceded two goals, when he fumbled Bishop's towering header on 37 minutes.
But fortunately for the former Wales undewr-21 International the ball dropped on top of the net rather than in it.
Harriers picked up their second booking on 43 minutes with A Smith cautioned for fouling Humphries in the centre circle.
Henriksen had another chance in first half injury time but he shot straight at the goalkeeper's leg after being fouled by Hartlepool defender Westwood's sliced clearance.
Home keeper Brock managed to keep out a Clarke cross-shot though it looked at one point as if he may stumble over his own goal line with the ball.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article