Other Flashcards
Gubernaculum (male)
- fibrous tract
- pulls testes of fetus down through inguinal canal/deep inguinal ring
- degenerates at birth
Processus vaginalis (male)
- pocket/diverticulum
- creates pathway for descending testes (snowplow in front of the car)
- degenerates at birth and becomes tunica vaginalis
External Spermatic fascia derived from ________
external oblique muscles
Cremasteric fascia derived from ________
internal oblique muscles
Internal spermatic fascia derived from ________
transversalis fascia
Median umbilical fold contains ________
obliterated urachus (left over from embryonic development)
Medial umbilical fold contains _______
- non-patent umbilical arteries left over from fetal development
- bilateral structure
Lateral umbilical fold contains ________
- inferior epigastric artery and vein
- bilateral structure
Retroperitoneal Organ Structures
S uprarenal gland A orta/IVC D uodenum (2nd and 3rd parts only) P ancreas (except tail) U reters C olon (ascending and descending) K idneys R ectum
Viscera derived from embryonic foregut (9)
- Lungs
- Trachea
- Esophagus
- Stomach
- Upper Duadenum (1+2)
- Liver
- Gallbladder/Bile duct
- Pancreas
- Spleen
Viscera derived from embryonic midgut (7)
- lower duodenum (2,3,4)
- Jejunum
- Ileum
- Cecum
- Appendix
- Ascending Colon
- Transverse colon (proximal 2/3)
Viscera derived from embryonic hindgut (6)
- Transverse colon (distal 1/3)
- Descending colon
- Sigmoid colon
- Rectum
- Upper anal canal
- Urogenital Sinus
Obliterated Umbilical artery is covered by the _______ fold
medial umbilical fold
Urogenital Folds develop into _______ (male) and _______ (female)
Shaft of penis
Labia Minora
Labioscrotal folds develop into _______ (male) and _______ (female)
Scrotum
Labia Majora
Urethral Plate develop into _______ (male) and _______ (female)
Penile urethra
Vestibule
Genital Tubercle develop into _______ (male) and _______ (female)
Glans penis
Glans clitoris
Urogenital Ridge –> _______, _________, ________
pronephros
mesonephros
metanephros
Pronephros
3rd week, cervical region, non-functional
Mesonephros
4th-10th week, Thoracic and Lumbar region, functional, temporary
Metanephros
permanent, functional, pelvic region
5th week begin to develop, functional by week 10
Mesonephric duct
- drain urine into developing bladder
- In males, develops into epididymus and vas deferens (when it connects to seminiferous tubules)
Metanephric Blastema
–> nephrons
Embryo is bipotential/ambisexual until week _____
6
Cord Cells develop into _______ (male) and _______ (female)
Sertoli cells
Follicular cells
Mesenchyme cells develop into _______ (male) and _______ (female)
Leydig cells
Stromal cells
Mullerian ducts: cranial –> _________ and caudal –> ___________
cranial = do not fuse, fallopian tubes caudal = fuse, uterus, and then vagina
Cranial fold creates __________ and __________
pericardioperitoneal canal and primitive pericardial cavity
Primitive pericardial cavity becomes __________ and ________ with ___________ folds
Pericardial cavity and Pleural cavity
Pleuropericardial folds
Pericardioperitoneal canals close with ____________
Pleuropericardial folds
Diaphragm developed from:
Septum transversum Pleuroperitoneal membrane Dorsal mesentary of esophagus Body wall mesoderm Somites from paraxial mesoderm (C3-C5)
Vasculogenic cell clusters –> __________
endocardial tube
Endocardial tubes (R/L) fuse to form ____________
primitive heart tube
Ductus Arteriosus
bypass pulmonary circulation
–> Ligamentum Arteriosum
Foramen Ovale
bypass pulmonary circulation
–> Fossa Ovalis
Ductus Venosus
bypass hepatic portal system
–> Ligamentum venosum
Umbilical vein
deliver O2 blood from placenta to fetus
–> Round Ligament (ligamentum teres)
Umbilical arteries
deliver blood from fetus to placenta
–> Medial Ligaments
Lung bud is derived from
ventral outpocketing of FOREGUT
__________ separates the esophagus from the lung bud/trachea
tracheoesophageal ridge/septum
Pseudoglandular stage
developing lung tissue resembles glands
Canalicular stage
terminal sacs start to form but no enough or mature enough for gas exchange
Terminal sac stage
increased number of terminal sacs and alveoli that can perform gas exchange
Alveolar stage
drastic increase in alveoli