Disclaimer: These entries do not list EVERY possible location of each Scannable Item, just the more obvious/easy ones.

Bek Phoebe Penelope Piper Centa Zyga Feepup Nomad White Blood Cell General Thymus
Spine, after a story event that begins the Endgame. Multiple locations. Nanolitho Lab (Liver) Multiple locations. Nanolitho Lab (Liver) Multiple locations. Nanolitho Lab (Liver) Materna (Womb) Materna (Womb) Throughout Penny. Goraknis room in Womb. Multiple locations. Thymus Academy (Heart)
Bursal Prime Aetria Red Blood Cell Liver Cell Hepato the 3rd Dagoo B. Otterman Yuri Gulson Gus
Bursal Chamber (Spine) Grand Central Station (Heart) Multiple locations. Odo counts. Metabolite (Liver). Metabolite (Liver) Gastric Bog (Pancreas). Bio-Shops in towns throughout Penny. The Bladder. Broncore (Lungs). West Pulmaro Mines (Lungs).
Gumbo Gully Gullard Spunk Phlegm Mub Cluster Cell Splicer Bacteriophage Phage Ticker
East Pulmaro Mines (Lungs) West Respira Refinery (Lungs) East Respira Refinery (Lungs) Oviduct (Cervix) Bottom-left Pulmaro Mines (Lungs) Booths in Grand Central Station (Heart) Multiple locations throughout Penny. Colon. Cervix Heart
Amolic Scaracoli

Protozoan

 Proto Mother Retch Creeping Retch Primal Retch Octolis Mawlor Goji
Colon. Also present in the Camo Leo fight in Lungs. Miniboss found behind a breakable wall in Colon. Throughout Cervix. Optional boss found behind breakable wall in Womb Found easily in Cervix & Liver. Multiple biomes throughout the game. Various rooms in Bladder, Womb, Colon, Abandoned Lab. Right Lobe (Liver.) Also, corpse found in Gastric Bog. Long room in Bile Facilities (Liver) Swimming in Pancreas (Liver)
Goraknis Tentacle Goraknis Phorgling Phorgog Cestoda Krabermite Krabernite Kraber Lord Esk Throcker
Fought in Womb before reaching Materna. Found in the chamber above Goraknis Tentacles. Can be scanned in the room left of the save point near Phorgog. Main boss of Cervix. Optional boss in Cervix, near the Old Fool. All over Lobules Path (Liver) Found throughout upper Liver. Main boss of upper Liver. Mostly found in Pancreas. Found in the Viral Zone and other places in Liver/Pancreas.
Goog Googma Gooper Gooper Alpha Hijacked Retch Hijacked Lobule Hijacked Hepato Ocutey Oculops Floculops
Bouncing off walls in Cervix. Optional boss behind a breakable wall in Cervix. Ambush you in multiple places in Liver & Pancreas. Optional boss in bottom right of Pancreas. Mandatory boss in Pancreas. Drops a Nerve Strand. Found through Pancreas & Liver. Quest boss in Bile Facilities Storage. Plentiful in Liver. Left Lobe (Liver) & Elsewhere Miniboss in The Heart. Drops a Nerve Strand.
Seeper Darts Squaggle Fluaggle Lumeeba Zor Unit Skitter Skitter Blocker Skitter Dooper Skitter Deflector
Easily found in Cervix. Easily found near Thymus Academy injection zone in Heart. Gallbladder. Lungs. Hiding in dark rooms throughout Lungs. 3x variants found in Upper Lungs. Easily found in Bladder. Found throughout the game. Plentiful in the Heart. Right of the Bio-Shop in the Lungs
Tatter Rattler Tract Maw Koble Scorb Volscorb Oxal Oxylop Oxystal Wob
Found near the Tract Maw in Bladder. Part of the Tract Maw boss fight in Bladder. Main boss of The Bladder. Need 5x Nerve Strands to reach. Miniboss in Bladder. Drops a Nerve Strand. Found mostly in the right side of the Upper Lungs. Miniboss in Lower Lungs. Throughout the Lungs. Throughout the Lungs. Throughout the Lungs. Easily found in Liver, Pancreas & Gallbladder.
Roo Caper Camo Leo Scowl Boom Dooper Blood Cell Dooper Thymus Gionoma Stalerus Diromitus Diromitus Core The Dooper Virus
Main Boss of the Gall Bladder. Main Boss of Respira Refinery (Lungs) Main Boss on train when going to The Heart for the first time. Found in the three Cardio Conspiracy rooms in Heart. Main Boss found in Thymus Academy after revealing the Cardio Conspiracy. Dooper Boss of the Liver.. Dooper Boss of the Lungs. Gauntlet/Chase boss in Heart. Dooper Boss of the Heart. Final boss, found in Colon.
Rakna Rayga Boom Drones Celluloid Stagmite Creatitus Plasma Doofer Mitisk Sparisk Falarisk
Hangs from ceilings in The Lungs. Pulmaro Mines (Lungs) Scowl Boom fight on the train or scannable in Cardac Chasms (Heart). Cardac Chasms / Viral Zone (Heart). Gallbladder Optional Boss in Viral Zone (Liver). Western Plasmorta (Heart) Cardac Chasms (Heart) Cardac Chasms (Heart) Cardac Chasms (Heart)
Amalo Siphirilium Screecher Adeno Squibble Dingle Pox Dooper Neutrophil Rabite Atom
Jump out of plasma pools in Plasmorta (Heart) Cardac Chasms (Heart) Lungs Heart Heart Lungs. Easiest is near the Zor Unit in wester Respira Refinery. Right Lobe (Liver) Near Cardio Conspiracy rooms in The Heart Bladder. Can be scanned in Bio-Shops.
Atomic Station Nerve Strand Synapse Globs Dooper Egg Drone Boom Box Enzymes Necrotized Antibody Bio-Mat
Everywhere. Dropped by 5x minibosses or scanned in the Cell Tower in Bladder. Multiple in each zone. Can be scanned in Bio-Shop. Everywhere. Throughout Penny. Throughout Penny. Save rooms everywhere. Throughout Penny. Throughout Penny. Throughout Penny.
Bio-Shop Feepup Carrier Pill Chest Nervous System Endoplasmic Transport Neutrophil Turret Oxygen Crystal
Broncore, Metabolite, Materna, Arteron In Materna, near the Bio-Mat. Throughout Penny. One in each biome. Bottom-left room of the Spine. Near Thymus Academy. All over the Lungs.