Todd, Robert Bentley, ed. 1836-52. The Cyclopaedia of Anatomy and Physiology. 4 Vols. London: Sherwood, Gilbert and Piper.

Microscope (by Carpenter, W. B.)
Milk (by Rees, G. O.)
Mollusca (by Owen, Richard)
Monotremata (by Owen, R.)
Monstrosity - see Teratology (by Vrolik, W.)
Mucous membrane (by Bowman, W.)
Mucus (by Rees, Owen G.)
Muscle (by Bowman, W.)
Muscular motion (by Bowman, W.)
Muscular system (by Jones, Rymer T.)
Myriapoda (by Jones, Rymer T.)
Neck (by Simon, John)
Nervous centres (by Todd, R. B.)
Nervous system (by Todd, R. B.)
Ninth pair of nerves (by Stekes, G.)
Nose (Human Anatomy) (by Poget, James)
Nutrition (by Carpenter, W. B.)
Olfactory nerves - see Nose (Human Anatomy) (by Poget, James)
Optic nerves (by Mayne, Robert)
Orbit (by Johnson, G.)
Organic analysis (by Miller, W. A.)
Osseous tissue (by Tomes, J.)
Ovary - see Supplement [Referenced headword does not exist]
Ovum (by Thomson, Allen)
Ovum - see Supplement [Referenced headword does not exist]
Pachydermata (by Jones, Rymer T.)
Pacinian bodies (by Bowman, William)
Pancreas (by Salter, Hyde )
Par Vagum nerve (by Reid, John)
Parotid region (by Johnson, George)
Parturition, Mechanism of (by Rigby, Edward)
Pelvis (by Wood, John )
Pelvis - see Supplement [Referenced headword does not exist]
Pericardium - see Heart (in anatomy) (by Reid, John)
Perineum (Surgical Anatomy) (by Mayne, Robert)
Peritoneum (by Pittard, Simon Rood)
Pharynx (by Trew, William)
Pisces (by Jones, Rymer T.)
Placenta - see Ovum (Supplement) and Uterus [Referenced headword does not exist]
Pleura (by Pittard, Simon Rood)
Polygastria (by Jones, Rymer T.)
Polypifera (by Jones, Rymer T.)