The entire parietal bone develops intramembranously
The pancreas develops from dorsal and ventral pancreatic buds
The lens of the eye develops from the optic vesicle
The liver develops from the ventral mesogastrium
Sclerotome gives rise to muscle
Septation of the heart occurs in the 5th week
Testes descend into the scrotum in the 6th month intrauterine
The gubernaculums gives rise to the vas deferens
Epispadias occurs on the dorsal surface of the penis
Abnormal uterus may occur due to improper development of the paramesonephric ducts
Siamese twins are more likely to occur when the zygote divides in two at the morula stage
Blastocyst has a fluid filled cavity
Oropharyngeal membrane has mesoderm
The Eustachian tube develops from the first branchial arch
Maxillary process contributes to the formation of the lip
The septum secundum gives rise to more vascular defects than septum primum
The left sinus venosus becomes entirely incorporated into the right atrium
Urogenital membrane doesn’t degenerate in men but it does in women
Each pair of identical twins may possess its own full set of membranes
The intra-embryonic coelem is a cavity in the endoderm
The amnion is continuous with endoderm of the embryo
The deciduas parietalis develops from trophoblast
The maternal surface of the placenta is rough and divided into a number of cotyledons
Intra embryonic mesoderm first develops by the process names delamination
The lienorenal ligament is developed from the dorsal mesogastrium
The ligamentum teres is a remnant of allantois
The vitello intestinal duct may persist giving rise to Meckel’s diverticulum
In the fetus, blood entering the right atrium through the IVC passes preferentially through the foramen
ovale
Atria develop from the bulbus cordis
Atriual ostium primum defects tend to be associated with defects of the atrioventricular valves
The right horn of sinus venosus contributes to the formation of the coronary sinus of the heart
An aortopulmonary fistula results from abnormal development of septum primum
The ascending aorta is the most common site for coarctation of the aorta
In meningocoele, the vertebral arch is incomplete
The retina develops from the neural tube
The olfactory neuronal cell bodies are derived from ectoderm
Schwann cells are derived from neuronal crest cells
Neural crest tissue contributes to the formation of the head
In a Cyclops fetus there is one single midline eye
Abnormally early fusion of the sagittal suture limits the lateral growth of the cranial vault
The primordial germ cells originate in the septum trankersum
Excess amniotic fluid is likely to coexist with bilateral renal agenesis
The uterus may possess a septum
The interstitial cells of the testis develop from germ cells
All of the bladder is derived from endoderm
The umbilical cord is surrounded by a layer of amnion
The smooth muscle of the uterus is derived from endoderm
Failure of the dividing membrane between urethra and gut to form leads to a recto-urethral fistula
The optic cup forms the pigmented part of the retina
Ureteric bud develops from the mesonephric duct
The septum transversium is related to the hindgut
The allantois is a derivative of the midgut
Hypospadias occurs on the ventral surface of the penis
The lining of the gut is derived from ectoderm
Alar plate is ventral horn
The epithelial lining of the gut is made from yolk sac
The primitive streak is made of endoderm
The allantois is an outgrowth of the midgut
The ovum can only be fertilized in the uterine tube
Glioblasts form before neuroblasts
Striated muscle is derived from somites
Sulcus limitans divides the basal and alar plates
The basal plate contains ventral motor neurones
Monozygotic twins can share a placenta
Duodenal mesentery can persist in the adult
The lens in the eye is composed of ectodermal cells
Ultrasound is used in the visualization of the vascular system
The morula contains a cavity called a blastocele
The zona pellucid disappears prior to implantation of the zygote
The placental blood vessels are mesodermally derived
An ectopic pregnancy would result if the fertilized ovum was to implant in the uterine tube
The cephalic end of the neural tube enlarges into three vesicles
The epithelial lining of the foetal vascular system is derived from the endoderm of the yolk sac
Neural crest cells are the precursors of peripheral nerves
The extrusion of urine from the umbilicus is due to remnant urachus
The umbilical arteries are formed from the dorsal aorta
Additional alveoli develop in the lung after birth
The epithelial lining of the respiratory tract is derived from the endoderm
Human lacks a fourth pharyngeal pouch
The intrinsic muscle of the tongue develops from occipital somite
Brachial cysts generally occur in the midline