QuestionSBA
QuestionChoice
This structure is derived from two structures: the ureteric bud (which branches from the nephric duct) and a region of spatially defined intermediate mesoderm termed the metanephric mesenchyme. It goes on to form the adult kidney. It provides large quantities of dilute urine for the maintenance of amniotic and allantoic fluid volumes, essential for normal placentation and development.
10001546
e
Metanephros
QuestionChoice
The epiblast is derived from the inner cell mass and lies above the hypoblast. The epiblast gives rise to the three primary germ layers (ectoderm, definitive endoderm, and mesoderm) and to the extraembryonic mesoderm of the visceral yolk sac, the allantois, and the amnion.
10001545
d
Epiblast
QuestionChoice
This gives rise to muscle, skeleton, kidneys and the reproductive system.
10001542
a
Mesoderm
QuestionChoice
This gives rise to the nervous system, the cornea and lens of the eye, and the skin.
10001543
b
Ectoderm
QuestionChoice
This gives rise to the majority of the internal organs. As an overview, it gives rise to the endocrine glands, liver, lungs and digestive tract.
10001544
c
Endoderm
Concept
Chapter
2693
3942
Development of the foregut
Topic
171
Embryology
12855
A baby is born with a defect in the functioning of the neuronal plexus within the muscular layer of his stomach. The gastroenterologist explains how this muscular layer forms within the embryo from the germ layers.

From which specific germ layer is he referring?
a