How do you refer to certain body parts of a player in R15?

Hey I'm pretty new myself so I hope this explanation helps!

So R6 only has 6 parts - head,torso,Left Arm,Right Arm,Right Leg,Left Leg

R15 has 15 parts - Head, Upper Torso, Lower Torso, LeftUpper Arm, LeftLower Arm, LeftHand, RightUpper Arm, RightLower Arm, RightHand, LeftUpperLeg, LeftLowerLeg, LeftFoot, RightUpperLeg, RightLowerLeg, RightFoot

local character = --the character rig
local humanoid = character.Humanoid

if(humanoid.RigType == enum.HumanoidRigType.R15) then
    local limb  = character[name_of_limb_goes_here]
end