Region Of Tiie Elbow
Elbow, Region Of Tiie ; Fold Or Bend Of The Arm. (fr. Pli Du Bras; Cuticle.) The Region Of The Elbow Is Situated At The Angular Union Of The Arm With The Fore-arm, And Con Tains The Humero-cubital Articulation And The Various Organs Which Surround It : The Extent Of ...
Region Of Tile Groin
Groin, Region Of Tile, (surgical Anatomy.) (fr. L'ainc, Region Inguinale.) The Limits Of This Region, As Understood By Most Surgical Writers, Seem To Be Wholly Artificial. The Groin Constitutes The Confines Of The Ab Domen And The Thigh ; And L'oupart's Ligament Forms A Natural Line Of Division Between Its ...
Regions And Muscles Of
Cranium, Regions And Muscles Of The, (surgical Anatomy.)—if A Line Be Drawn On The Skull From The External Ancrular Process Of The Frontal Bone, Backwards :long The Rough Line On That And The Parietal Bone, Which Indicates The Attachment Of The Temporal Fascia, Be Continued Downwards And Backwards Parallel And ...
Regions Of Foot
Foot, Regions Of Ti1e.—the Sur Gical Anatomy Of The Ankle Having Already Been Given, (see Ankle, Regions Or,) It Remains For Us, In This Article, To Describe The Foot Pro Perly So Called, That Is, All Of The Lower Extremity Beyond The Ankle. This Part Comprises Much That Is Practically ...
Renal Organs In The
Renal Organs In The Lower Animals. Under This Head We Purpose To Refer Briefly To Such Facts In The Anatomy Of The Urinary Organs Of The Lower Animals As Will Serve To Render More Intelligible The Structure And Office Of The Human Kidney. Invertebrata.— That The Excretion Of Urine Is ...
Rept Les
Rept! Les. - This, Class The Optic Nerses„ Are Derived From Optic Lobes Very Similar To Those Iri Fish ; They Are! Two In Nuniber And Interposed Between The Cerebral Hemispheres And The Cerebellum : Their Size Is Proportional To The Developement Of Thei, Optic Nerves, And They Are Best ...
Reptilia
Reptilia. - The Spermatozoa Of The Rep Tilia Possess The Same Shape As Those Of Birds ; That Is To Say, An Oblong Cylindrical Body, And A Very Fine Hair-like Tail. No Great Differences Present Themselves In The Form Of These Elements Aniong The Rep Tilia With Scales. Lizards, Snakes, ...
Respiration
Respiration (germ. Athnzung).—be Fore The Nutritious Juices Of Organized Bodies Can Be Properly Elaborated And Rendered Fit For Maintaining The Vitality Of The Tissues Through Which They Move, It Is Indispensable That Certain Chemical Changes Take Place Between Them And The Atmospheric Air. All Organized Bodies, Therefore, Vegetable As Well ...
Respiratory
Respiratory Organs.—the Branchi Pre Sent The Same General Form And Structure In Both Orders Of Cephalopods, But Differ, As Before Ob Served, In Number, And Also In Their Mode Of Attachment To The Mantle. They Are Always Entirely Concealed And Protected By The Mantle, -which Is Extended Forwards So As ...
Respiratory System
Respiratory System. The Lungs Of The Monotremata Are Con Fined To The Thoracic Cavity, And Suspended Freely In Compartments Partitioned Off By Du Plicatures Of The Pleura. The Right Lung Is Divided, In The Ornithorhynchus, Into Three Lobes, Of Which The Smallest (fig. 187, N) Fills The Interspace Between The ...
Rodentia
Rodentia (glires, Linn.) (fr.l?ongeurs), —an Important Order Of Mammiferous Verte Brate, Distinguishable By The Remarkable Struc Ture Of Their Incisor Teeth, Which Are Adapted To Perform The Office Of Chisels By Cutting And Gnawing Away The Hard Vegetable Substances, -which Form Their Principal Food. The Animals Of This Order, Indeed, ...
Rose Division
Rose Division Comprehends Four Classes Of Helminthoid Animals And The Same Number Of Entomoid Classes, Viz. 6. Entozoa, Parasitic, Simple, Internal, Or Fixed Animals, For The Most Part Of A Lengthened Cylindrical Form, Without Distinct Organs Of Sense Or Any Internal Skeleton, The Mouth Or Anterior Part Of The Body ...
Rotifera 413
Rotifera. 413 Canal Is Constructed Into A Bag Or Stomach, As Brachionus. 4. Trachelocystica, With A Simple Alimentary Canal, Enlarged At The Lower Part, As In Rotifer. The Upper Part Of The Alimentary Canal Be Low The Jaws Is Called By Ehrenberg The Ceso Phagus, And Is Said To Be ...
Ruminantia
Ruminan'tia (lat. 'rzi- 'nzinare, To Chew The Cud), Eng. Ruminants ; Fr. Runzinans ; Ger. Wiederkduende Thiere, — A Well Defined Order Of Mammalian Quadrupeds, Presenting The Following Essential Characters : Upper Jaw In Nearly All Cases Destitute Of Incisor Teeth, Their Place Being Supplied By A Callous Pad, While ...