should be ready.

code/modules/surgery/organs/ears.dm

@@ -25,7 +25,7 @@
 		return
 	var/mob/living/carbon/C = owner
 	// genetic deafness prevents the body from using the ears, even if healthy
-	if(C.has_trait(TRAIT_DEAF))
+	if(HAS_TRAIT(C, TRAIT_DEAF))
 		deaf = max(deaf, 1)
 	else if(ear_damage < UNHEALING_EAR_DAMAGE) // if higher than UNHEALING_EAR_DAMAGE, no natural healing occurs.
 		ear_damage = max(ear_damage - 0.05, 0)
@@ -37,7 +37,7 @@
 
 	var/mob/living/carbon/C = owner
 
-	if(iscarbon(owner) && C.has_trait(TRAIT_DEAF))
+	if(iscarbon(owner) && HAS_TRAIT(C, TRAIT_DEAF))
 		deaf = 1
 
 /obj/item/organ/ears/proc/adjustEarDamage(ddmg, ddeaf)

code/modules/surgery/organs/eyes.dm

@@ -26,7 +26,7 @@
 			HMN.regenerate_icons()
 		else
 			eye_color = HMN.eye_color
-		if(HMN.has_trait(TRAIT_NIGHT_VISION) && !lighting_alpha)
+		if(HAS_TRAIT(HMN, TRAIT_NIGHT_VISION) && !lighting_alpha)
 			lighting_alpha = LIGHTING_PLANE_ALPHA_NV_TRAIT
 			see_in_dark = 8
 	M.update_tint()

code/modules/surgery/organs/liver.dm

@@ -25,7 +25,7 @@
 			//slowly heal liver damage
 			damage = max(0, damage - 0.1)
 
-			if(filterToxins && !owner.has_trait(TRAIT_TOXINLOVER))
+			if(filterToxins && !HAS_TRAIT(owner, TRAIT_TOXINLOVER))
 				//handle liver toxin filtration
 				for(var/I in C.reagents.reagent_list)
 					var/datum/reagent/pickedreagent = I

code/modules/surgery/organs/lungs.dm

@@ -58,7 +58,7 @@
 /obj/item/organ/lungs/proc/check_breath(datum/gas_mixture/breath, mob/living/carbon/human/H)
 	if((H.status_flags & GODMODE))
 		return
-	if(H.has_trait(TRAIT_NOBREATH))
+	if(HAS_TRAIT(H, TRAIT_NOBREATH))
 		return
 
 	if(!breath || (breath.total_moles() == 0))
@@ -66,7 +66,7 @@
 			return
 		if(H.health >= H.crit_threshold)
 			H.adjustOxyLoss(HUMAN_MAX_OXYLOSS)
-		else if(!H.has_trait(TRAIT_NOCRITDAMAGE))
+		else if(!HAS_TRAIT(H, TRAIT_NOCRITDAMAGE))
 			H.adjustOxyLoss(HUMAN_CRIT_MAX_OXYLOSS)
 
 		H.failed_last_breath = TRUE
@@ -365,7 +365,7 @@
 /obj/item/organ/lungs/proc/handle_breath_temperature(datum/gas_mixture/breath, mob/living/carbon/human/H) // called by human/life, handles temperatures
 	var/breath_temperature = breath.temperature
 
-	if(!H.has_trait(TRAIT_RESISTCOLD)) // COLD DAMAGE
+	if(!HAS_TRAIT(H, TRAIT_RESISTCOLD)) // COLD DAMAGE
 		var/cold_modifier = H.dna.species.coldmod
 		if(breath_temperature < cold_level_3_threshold)
 			H.apply_damage_type(cold_level_3_damage*cold_modifier, cold_damage_type)
@@ -377,7 +377,7 @@
 			if(prob(20))
 				to_chat(H, "<span class='warning'>You feel [cold_message] in your [name]!</span>")
 
-	if(!H.has_trait(TRAIT_RESISTHEAT)) // HEAT DAMAGE
+	if(!HAS_TRAIT(H, TRAIT_RESISTHEAT)) // HEAT DAMAGE
 		var/heat_modifier = H.dna.species.heatmod
 		if(breath_temperature > heat_level_1_threshold && breath_temperature < heat_level_2_threshold)
 			H.apply_damage_type(heat_level_1_damage*heat_modifier, heat_damage_type)

code/modules/surgery/organs/organ_internal.dm

@@ -110,7 +110,7 @@
 	var/breathes = TRUE
 	var/blooded = TRUE
 	if(dna && dna.species)
-		if(has_trait(TRAIT_NOBREATH, SPECIES_TRAIT))
+		if(HAS_TRAIT_FROM(src, TRAIT_NOBREATH, SPECIES_TRAIT))
 			breathes = FALSE
 		if(NOBLOOD in dna.species.species_traits)
 			blooded = FALSE