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Embryology > Germ Cell Derivatives > Flashcards

Germ Cell Derivatives Flashcards

1
Q

Surface Ectoderm

A

Epidermis, Hair, Nails, Inner ear, external ear, Enamel of teeth, Lens of eye, Anterior Pituitary (Rathke’s Pouch), Parotid gland, anal epithelium to dentate line

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2
Q

Neuroectoderm- Neural Tube

A

CNS, Retina and optic nerve, Pineal gland, Neurohypophysis, Astrocytes, Oligodendrocytes, ependymal cells, choroid plexus, Pre-ganglionic autonomic fibers

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3
Q

Neuroectoderm- Neural Crest

A

Adrenal Medulla, Ganglia- Sensory (Unipolar) and Autonomic (Post-ganglionic), Melanocytes, Schwann cells, Pia and Arachnoid mater, Pharyngeal arch cartilage, Odontoblasts, Parafollicular (C) cells, Aorticopulmonary septum, Endocardial cushions.

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4
Q

Sonic hedgehog

A

Anterior- posterior axis

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5
Q

Wnt-7

A

Dorsal-ventral axis

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6
Q

FGF gene

A

Lengthening of limbs by stimulating mitosis of underlying mesoderm

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7
Q

Homeobox (Hox) gene

A

Cranio-caudal direction : mutations cause appendages in wrong location.

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8
Q

Mesoderm

A

Muscle, bone, blood, genital tissues, dermis, most organ systems, serous lining of body cavities, spleen, kidney, adrenal cortex, testes, ovaries, lymphatics, upper 1/3 of vagina

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9
Q

Endoderm

A

Thyroid tissue, epithelial lining of GIT, lung, bladder, urethra, outer and middle ear, bulk of liver, pancreas and lungs, eustachian tube, lower 2/3 of vagina

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10
Q

Monozygotic twins: 0-4 days

A

Dichorionic diamniotic

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11
Q

Monozygotic twins: 4-8 days

A

Monochorionic diamniotic

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12
Q

Monozygotic twins: 8-12 days

A

Monochorionic monoamniotic

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13
Q

Monozygotic twins: >13 days

A

Monochorionic monoamniotic conjoined twins

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14
Q

Umbilical arteries and vein derived from–

A

Allantois

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15
Q

Truncus arteriosus

A

Ascending aorta and Pulmonary trunk

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16
Q

Bulbous cordis

A

Right ventricle and smooth parts (outflow tracts) of left and right ventricle

17
Q

Left horn of Sinus Venosus

A

Coronary sinus

18
Q

Right horn of Sinus Venosus

A

Smooth part of Right atrium

19
Q

Right Common Cardinal Vein and Right Anterior Cardinal vein

A

Superior Vena Cava

Embryology (6 decks)

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