Iniyriapoda
Iniyriapoda, (from The Greek Kceetat, Ten Thousand, I.e. Numerous, And Srous, A Foot,) The Name Of An Important And Highly Interest Ing Class Of Articulated Animals, Intermediate In Their Structure And Appearance Between The Annelidans And The Insects, Properly So Called ; Approximating The Former In The Worm-like Form Of ...
Insecta
Insecta. A Large Number Of Insects Are Mute ; Some Produce Their Sounds Merely By Friction, And Others By The Passage Of The Air Through The Thoracic Spiracles. The Sounds Produced By Friction Are Denominated Stridu Lation ; Those By The Air From The Trachem, Buzzing, Or Humming (bourdonnement), &c. ...
Insectivora
Insectivora, ( Insccta,voro,) A Group Of Mammiferous Animals, Considered By Some Au Thors As A Distinct Order ; By Others, And Parti Cularly By Cuvier, As A Family Only Of The Great Carnivorous Order, Named By That Great Natura List Carnassier.s. The Peculiarities Of Struc Ture By Which The Insectivora ...
Integudientary System
Integudientary System. - Under This Head We Proceed To Indicate Very Briefly Certain Peculiarities Of The Hair, And More Particularly The Elastic Cushion Of The Sole Of The Foot, And The Remarkable Protuberances Situated On The Back Of The Camel. While The Growth And Condition Of The Cuti Cular Layer ...
Irritability
Irritability; Etym. Irrito, To Irritate, Stimulate, Excite ; Syn. Contractility, Dr. Bos Tock ; The Vas Insita, As Distinguished From The Vis Nervosa, Of Haller; Germ. Reizbarkeit ; That Peculiar Vital Power In The Muscular Fibre By Which It Contracts On Being Stimulated. The Term Irritability Is Certainly Not The ...
It True Tiermaprroditism
It. True Tiermaprroditism. True Hermaphroditism Exists As The Normal Type Of Sexual Conformation In Several Classes Of The Vegetable And Animal Kingdom. Almost All Phanerogamic Plants, With The Exception Of Those Included Under The Class Dicecia, Are Fur Nished With Both Male And Female Reproductive Organs, Placed Either Upon The ...
Iv American Nations
Iv. American Nations. —the Aboriginal Inhabitants Of America Have Been Considered By Some Ethnologists As A Department Of The Human Family Very Distinct From The Inhabit Ants Of The Old World ; And Attempts Have Been Frequently Made To Define Them As A Race By Physical Characters. But These Attempts ...
Iv Changes Consequent On
Iv. Changes Consequent On Fruitful Sexual Union. 1. As Regards The Female Chiefly. Concep Tion.—the Consequence Of Fruitfu•sexual Union In Man And Quadrupeds Is The Dislodgement Of One Of The Ova Contained In The Ovarium, And The Fecundation Of This Ovum In Somepart Of Its Passage From The Ovarium, Where ...
Iv The Relation Of
Iv. The Relation Of Tiie Circulation To Other Functions. 1. Respiration.—of The Opinions Of Those Who Attribute The Suction Of The Blood Through The Veins To Powers Vvithin The Chest, There Are Chiefly Two Which Have Of Late Years At Tracted Attention,—those Namely Of Dr. Car Son Of Liverpool,"' And ...
Joint Of Ankle
Ankle, Joint Of The.—(normal Ana Tomy.) (fr. Articulation Du Coude-pied. Germ. _fussgelenk. Ital. Caviglia.) The Ankle-joint, Or Tibio-tarsal Articulation, Results From The Junc Tion Of The Leg And Foot. For Reasons Which Will Appear When We Come To Explain Its Mo Tions, It Is 'ranked In The Excellent And Com ...
Joints
Joints Of.) The Muscles Of The Great Toe Are Remarkable, As Might Be Expected, For Their Size And Strength. The Long Flexor Is Considerably Larger Than That Common To The Other Toes, And Gives To This A Slip Of Its Tendon, So That The Flexor Longus Pol Licis Does In ...
Joints Of Tile Fingers
Joints Of Tile Fingers. 1. Metacayo-phakngeat Joints.—the First Phalanges Are Articulated By An Oval Concave Surface, With The Rounded Oblong Heads Of The Inferior Extremities Of The Metacarpal Bones: It Is Remarkable That The Long Axis Of The Oval Concavity Of The Phalanx Has A Transverse Di Rection, While The ...
Joints Of Tile Rand
Joints Of Tile Rand. Joints Of The Carpus.—the Bones Consti Tuting Each Row Of The Carpus Are Firmly Con Nected By Strong Ligaments, So That Their Com Bined Surfaces Form One Extended Surface Adapted To The Radius, Or To The Metacarpus, Or To Each Other. Thus The Union Of The ...
Knee Joint
Knee-joint (normal Anatomy Of The). Gr. .yeia ; Lat. Gene; Fr. Genou ; Germ. Kniegelenk ; Ital. Ginocchio. The Knee-joint, The Largest Joint In The Body, Results From The Articulation Of The Os Femoris With The Tibia Below And The Patella Anteriorly. It Admits Of Extensive Motion As A Ginglymus, ...
Larynx Morbid Anatomy And
Larynx. (morbid Anatomy And Path Logy.)—the Importance Of This Organ To Lif And Even When Existence Is Not Actually Ei Dangered, To The Comfort And Well-being Of Tl Individual, Must Render Any Deviation From I Healthy And Normal Condition In The Highestd Gree Interesting To The Pathologist : Nor Wi ...