﻿128 
  ON 
  THE 
  VISCERAL 
  ANATOMY 
  

  

  the 
  body 
  on 
  each 
  side 
  ; 
  when 
  thus 
  stretched 
  it 
  forms 
  a 
  curve, 
  the 
  

   broadest 
  part 
  of 
  which 
  is 
  about 
  the 
  middle. 
  The 
  lower 
  portions 
  of 
  

   the 
  two 
  oviducts 
  rapidly 
  approach 
  each 
  other 
  towards 
  the 
  caudal 
  ex- 
  

   tremity, 
  and 
  passing 
  on 
  the 
  ventral 
  face 
  of 
  the 
  rectum, 
  proceed 
  on 
  

   each 
  side 
  of 
  the 
  anus 
  to 
  open 
  by 
  an 
  oval 
  orifice 
  within 
  the 
  upper 
  mar- 
  

   gin 
  of 
  the 
  vaginal 
  pouch. 
  The 
  upper 
  portions 
  of 
  the 
  oviducts 
  form 
  a 
  

   curve, 
  whose 
  concavity 
  looks 
  towards 
  the 
  spine, 
  and 
  approach 
  the 
  up- 
  

   per 
  end 
  of 
  the 
  row 
  of 
  ovaria, 
  without, 
  however, 
  touching 
  them. 
  Each 
  

   upper 
  orifice, 
  or 
  fimbriated 
  extremity 
  as 
  it 
  must 
  be 
  termed, 
  is 
  a 
  free, 
  

   very 
  distensible 
  opening, 
  one 
  inch 
  in 
  length, 
  forming 
  a 
  sulcus 
  inwards, 
  

   which 
  terminates 
  in 
  a 
  point 
  ; 
  from 
  this 
  point 
  proceeds 
  a 
  well 
  defined 
  

   edge, 
  two 
  inches 
  long 
  when 
  put 
  on 
  the 
  stretch, 
  formed 
  of 
  peritoneum, 
  

   and 
  acting 
  as 
  a 
  ligament 
  of 
  attachment. 
  The 
  orifice 
  of 
  the 
  oviduct, 
  

   therefore, 
  is 
  removed 
  considerably 
  from 
  the 
  ovaria 
  ; 
  with 
  this 
  arrange- 
  

   ment 
  it 
  is 
  not 
  easy 
  to 
  explain, 
  either, 
  how 
  the 
  semen 
  masculinum 
  ar- 
  

   rives 
  at 
  the 
  ovaria, 
  or 
  how 
  the 
  products 
  of 
  impregnation 
  can 
  get 
  into 
  

   the 
  oviduct. 
  The 
  vagina, 
  common 
  to 
  the 
  ureters 
  and 
  oviduct, 
  is 
  a 
  

   pouch 
  of 
  a 
  conoidal 
  shape, 
  three 
  inches 
  deep, 
  and 
  an 
  inch 
  and 
  a 
  half 
  

   in 
  diameter 
  at 
  the 
  external 
  opening, 
  which 
  is 
  also 
  larger 
  and 
  more 
  ex- 
  

   posed 
  than 
  the 
  anus. 
  It 
  is 
  placed 
  between 
  the 
  termination 
  of 
  the 
  

   rectum 
  and 
  the 
  spine, 
  filling 
  up 
  all 
  the 
  space 
  between 
  the 
  ribs 
  at 
  

   this 
  part. 
  The 
  orifices 
  of 
  the 
  oviducts 
  are 
  oblique, 
  a 
  quarter 
  of 
  an 
  

   inch 
  in 
  their 
  long 
  diameter, 
  and 
  are 
  placed 
  about 
  an 
  inch 
  apart, 
  within 
  

   the 
  upper 
  edge 
  of 
  the 
  vagina. 
  

  

  RESPIRATORY 
  ORGANS. 
  

  

  The 
  larynx 
  consists 
  of 
  a 
  single 
  cartilage, 
  having 
  a 
  narrow 
  oblique 
  

   slit 
  in 
  it, 
  about 
  six 
  lines 
  in 
  length, 
  for 
  the 
  transmission 
  of 
  air 
  ; 
  the 
  

   trachea 
  is 
  one 
  foot 
  eight 
  inches 
  in 
  length, 
  and 
  three-eighths 
  of 
  an 
  inch 
  

   in 
  diameter, 
  and, 
  as 
  before 
  remarked, 
  passes 
  down 
  attached 
  to 
  the 
  

   ventral 
  face 
  of 
  the 
  oesophagus. 
  It 
  consists 
  of 
  a 
  great 
  number 
  of 
  imper- 
  

   fect 
  cartilaginous 
  rings, 
  interrupted 
  posteriorly, 
  but 
  joined 
  by 
  an 
  elastic 
  

   substance 
  which 
  keeps 
  their 
  extremities 
  in 
  contact. 
  Each 
  ring 
  is 
  con- 
  

   nected 
  to 
  the 
  adjoining 
  one 
  by 
  a 
  membrane 
  also 
  elastic, 
  so 
  that 
  when 
  

   the 
  trachea 
  is 
  stretched 
  lengthwise, 
  it 
  will 
  easily 
  regain 
  its 
  former 
  

   condition. 
  It 
  passes 
  behind 
  the 
  heart, 
  and 
  while 
  there 
  concealed, 
  

  

  