Everything else through the door (#19358)

code/modules/surgery/dental_implant.dm

@@ -4,7 +4,7 @@
 	possible_locs = list(BODY_ZONE_PRECISE_MOUTH)
 
 /datum/surgery/dental_implant/can_start(mob/user, mob/living/carbon/target)
-	if(istype(target,/mob/living/carbon/human))
+	if(ishuman(target))
 		var/mob/living/carbon/human/H = target
 		if(!H.check_has_mouth())
 			return FALSE

code/modules/surgery/organs/organ_internal.dm

@@ -29,7 +29,7 @@
 	M.internal_organs |= src
 	M.internal_organs_slot[slot] = src
 	var/obj/item/organ/external/parent
-	if(istype(M, /mob/living/carbon/human))
+	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		parent = H.get_organ(check_zone(parent_organ))
 		if(!istype(parent))
@@ -59,7 +59,7 @@
 			if(M.stat != DEAD)//safety check!
 				M.death()
 
-	if(istype(M, /mob/living/carbon/human))
+	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		var/obj/item/organ/external/parent = H.get_organ(check_zone(parent_organ))
 		if(!istype(parent))
@@ -299,7 +299,7 @@
 	if(!owner)
 		return
 
-	if(istype(owner, /mob/living/carbon/human))
+	if(ishuman(owner))
 		var/mob/living/carbon/human/H = owner
 		var/obj/item/organ/external/head/head_organ = H.get_organ("head")
 		if(!(head_organ.h_style == "Very Long Hair" || head_organ.h_style == "Mohawk"))

code/modules/surgery/organs_internal.dm

@@ -81,7 +81,7 @@
 	. = ..()
 	if(!.)
 		return FALSE
-	if(istype(target, /mob/living/carbon/human))
+	if(ishuman(target))
 		var/mob/living/carbon/human/H = target
 		var/obj/item/organ/external/affected = H.get_organ(user.zone_selected)
 		if(affected && affected.encased) //no bones no problem.

code/modules/surgery/plastic_surgery.dm

@@ -31,7 +31,7 @@
 		var/obj/item/card/id/ID
 
 		//IDs in hand
-		if(istype(user, /mob/living/carbon/human)) //Only 'humans' can hold ID cards
+		if(ishuman(user)) //Only 'humans' can hold ID cards
 			var/mob/living/carbon/human/H = user
 			ID = H.get_id_from_hands()
 			if(ID)

code/modules/surgery/surgery.dm

@@ -407,7 +407,7 @@
 		var/obj/item/organ/external/affected = target.get_organ(target_zone)
 		if(can_infect && affected)
 			spread_germs_to_organ(affected, user, tool)
-	if(ishuman(user) && !istype(target, /mob/living/carbon/alien) && prob(60))
+	if(ishuman(user) && !isalien(target) && prob(60))
 		var/mob/living/carbon/human/H = user
 		switch(blood_level)
 			if(SURGERY_BLOODSPREAD_HANDS)