FRS Flashcards
3 parts of Uterus
Fundus, body, cervix
Posterosuperior
In back and above
3 tissue layers of fundus and body
Peritoneum/perimetrium, myometrium, endometrium
Peritoneum/perimetrium
Double layered membrane
Myometrium
Thick smooth muscle layer, cells undergo hypertrophy and hyperplasia during pregnancy to expel fetus at birth
Endometrium
Inner mucous membrane lining uterus, 2 parts (deep stratum basalis, superficial stratum functionalis)
Deep stratum basalis
Limited change through menstrual cycle, not shed
Superficial stratum functionalis
Proliferates in response to oestrogen, secretory in response to progesterone. Sheds, regenerates from cells in stratum basalis layer
Primary support for uterus
Pelvic floor
Broad ligament
Double layer of peritoneum attaching uterus to pelvis
Pudendum
Vulva - external genitalia
Bartholins glands
Superficial pouch, secrete lubricating mucus
Fourchette
Fold of skin at back of vulva
Parts of uterine tube
Isthmus, ampulla, infundibulum, fimbriae
Yolk sac
First site of blood cell formation
Chorion
Principle part of placenta, outermost membrane around embryo
Amnion
Surrounds embryo, amniotic fluid
Allantois
Vascular connection between embryo and placenta
Pluripotent stem cells
Tissue formation, any embryonic cell type eg neural, muscular, blood
Gastrulation
Organs derive from specific germ layer (DAY 14-16)
Ectoderm formations
Pigment cells, skin cells of epidermis, neuron of brain
Mesoderm formations
Cardiac, smooth, skeletal muscle, tubule cell of kidney, RBC
Endoderm formations
Alveolar cell, pancreatic cell, thyroid cell
Germ cells
Sperm and egg
DAY 17-19
Cephalic and caudal region form
DAY 19-21
Neural System develops from ECTODERM layer
DAY 23-26
Neural tube closure, neural plate folds to form groove, fold, tube
Neural crest cells
Dorsal, migratory, contribute to many structures
Somites
(Day 19) 44 pairs total, produce muscle, vertebral and rib bones
Ears develop from
Otic placodes (week 4 disappears from surface, week 5 forms inner ear)
Eye development
Week 4, cells in optic placode form lens
Heartbeat
Day 22
Heart circulation
Day 27-28
Lung development
Endoderm and mesoderm - supply alveoli
Ectoderm - neural innervation
Mesoderm - musculoskeletal support
Kidney development occurs in
Urogenital ridge (in association with genitals)
3 stages of kidney development
Pronephros (day 18), mesonephros (day 24), metanephros (day 35)
GI system develops from
Endoderm (week 2/3)
Mesoderm (mesentry, smooth muscle, blood vessels)
Ectoderm (enteric nervous system)
Pancreas embryo
Herniated on outer surface of embryo then reabsorbed
All essential structures initiated by
Week 9
Septal defect
Failure to form division between left and right side of the heart
Gastroschisis
Failure of abdominal wall to close, intestines herniated (young mothers, small babies)
Omphalocoele
Severe abdominal wall defect, liver, stomach, intestines herniated (older mothers)
Blastocyst hatching
Egg released from protective coat (Zona pellucida)
Placenta cells in blastocyst
Trophectoderm
Auricular surface of ilium articulates with
Auricular surface of sacrum to form the sacroiliac joint