Head & Neck by Dr Ahmed Kamal

Head & Neck by Dr Ahmed Kamal
شرح مادة التشريح (الأناتومي) في كلية الطب باللغة العربية الدكتور أحمد كمال من مصر

Introduction to Human Anatomy By Dr Ahmed Kamal

Introduction to Human Anatomy By Dr Ahmed Kamal

شرح مبادئ علم التشريح للأستاذ الدكتور أحمد كمال رئيس قسم التشريح بطب الأزهر

Special Embryology

Urogenital system

development of urinary bladder :

Mesonephric duct divide primitive urogenital sinus into :

vesicourethral part (  upper )

definitive urogenital duct ( lower )

Urinary bladder derivative from :

1 – Vesicourethral  canal  of coloaca ( major )  [ endoderm ]

2 – Apex derived  from   →   Allantose ( proximal part )  [ endoderm ]

note distal part of allantois  give  median umbilical ligament

3 – trigone of bladder  developed from   →   mesonephric duct    [ mesoderm ]

Note  the base of bladder ( rose , , most sensitive , corregated , rich of blood supply )

due to their origin from mesoderm 

development  of ureter :

mesonephric duct give    →       ureteric  bed  (with metanephric cap wich rise  upward to abdomen )

ureteric bed extends above  &  opend direct into trigon

1 – definitive of urogenital:   [ mesoderm ]

pelvic part : lower of prostatic urethra & membranous part of urethra

phalic part : give  →  penil urethra

2 – vasicourethral canal  [ endoderm ]   →   upper part of prostatic urethra ( at level of ejaculatory duct )

development of gonads :

in different stages [ ovary or testes ] :

1 – genital ridge : medial part  of  mesonephrus ____ capsul (  tunica albugenia ) of testes  stroma  & septae

2 – coelomic  epithelium [ mesoderm ] :  sex  cord ( sertoli ) seminephrus tubules & rete testes

3 – primordial  germ  cell [ endoderm ] : spermatozoa  

descent  of  testes :

  • it s develops in the abdomen then descends
  •  reach deep inguinal ligament  ( internal descend ) at  7th month
  •  it migrates in the inguinal canal at 8th month

causes of descent :

  1. internal  descent  ( upper part of abdominal wall grow faster than lower part )
  2. rise of  intraabdominal  pressure ( growth & enlarged of abdominal organs )
  3. shortness ( during growth ) of gubernaculm  ( fibrous band attatch to scrotum )

development of the ovary :

1 – the same as the testes

2 – gives follicular cells instead sex cord

3 – migrating from yolksac   ⇒  gives oogonia wich

Divided into masses called primary follicle  OVA

Descent of ovary

Develop in the abdomen  it undergoes  internal  descent to reach the pelvic

The gubernaculums becomes ovarian ligament & round ligament

Development of vagina :

Upper third of the vagina developed from the uterovaginal canalmesoderm ]

Lower 2 third developed from paramesonephric duct ( mullerian duct )

[ considered endoderm ]

Development of external genitalia :

(  female )

Genital tubercle     form       ⇒  , clitoris

Genital fold    form   ⇒   , labia  minora

Genital swellings     form   ⇒   , the  two  labia  majora

( Male )

Genital tubercle   form   ⇒  , glans penis

Migration of ectodermal cells at the tip of the glans phallus    form   ⇒    Distal end of penil urethra

Genital & scrotal swelling fuse together to form       ⇒    scrotum

Phallus ascend with genital membrane     form     ⇒    urethra

Note  All are  originated  from endoderm except distal part of urethra in glans penis are ectoderm

 

 

 

Pelvis – Dr Ahmed Alkomsi sem3

Anatomy Pelvis records by Dr.Ahmed Alkomsi

This course was made by Dr.Ahmed Alkomsi
The textbook which is used in this course is unknown
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Abdomen Dr ahmed belhaj sem 2

Anatomy Abdomen records by Dr.ahmed belha

This course was made by Dr.ahmed belha
The textbook which is used in this course is unknown
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Dr Khaled Milad Thorax 2nd semester

Anatomy thorax records by Dr.Khaled Milad

This course was made by Dr.Khaled Milad
The textbook which is used in this course is unknown
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Embryo records by Dr.Khaled Milad 8 Lectures sem1

Anatomy Embryo records by Dr.Khaled Milad

This course was made by Dr.Khaled Milad
The textbook which is used in this course is unknown
This course was provided by Ly student organization in order to save your time we hope that you leave a comment about this course if you already watched it in order to give a clear idea about it for the other students and don’t forget that your help improve this library which helps other students to get the knowledge. Continue reading

Embryo Dr.Khaled Milad ( first part ) sem1

Anatomy Embryo records by Dr.Khaled Milad

This course was made by Dr.Khaled Milad
The textbook which is used in this course is unknown
This course was provided by Ly student organization in order to save your time we hope that you leave a comment about this course if you already watched it in order to give a clear idea about it for the other students and don’t forget that your help improve this library which helps other students to get the knowledge. Continue reading