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Body Log Glossary > Embryology > Flashcards

Embryology Flashcards

1
Q

Morphogenesis

A

Development of form and structure

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2
Q

Differentiation

A

Specialisation for function

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3
Q

Cleavage

A

Splitting without growth
Forms the morula

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4
Q

Compaction

A

Forms the blastocyst
Trophoblasts line the cell and the embryoblasts cluster at the top

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5
Q

Oocyte

A

Egg cell

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6
Q

Zygote

A

fertilised oocyte

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7
Q

Zona pellucida

A

Glycoprotein cell that protects the zygote

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8
Q

Toti potent

A

Has the capacity to become any cell type
(before compaction)

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9
Q

Pluripotent

A

Has the capacity to become many cell types
(after compaction)

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10
Q

Bilaminar disk

A

The inner cell mass of embryoblasts differentiates into two layers (epiblasts and hypoblasts)

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11
Q

Ectopic Pregnancy

A

Implantation occurs at site other than uterine body e.g fallopian tube

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12
Q

Placenta Praevia

A

Implantation occurs in the lower uterine segment

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13
Q

Blastocoele

A

Cavity formed from compaction

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14
Q

Amniotic sac

A

Formed from spaces within the epiblast

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15
Q

Primitive yolk sac

A

Formed by hypoblasts lining the blastocoele

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16
Q

Secondary yolk sac

A

Pinches off from primitive yolk sac

17
Q

Extraembryonic coelom

A

Chorionic cavity
formed from spaces within the extraembryonic reticulum and mesoderm

18
Q

Ectoderm

A

Epiblast derivitive
Organs and structures that maintain contact with outside world e.g Nervous system

19
Q

Mesoderm

A

Epiblast derivitive
Supporting tissues e.g MSK, vascular system

20
Q

Endoderm

A

Internal structures e.g lining of GI, respiratory tract

21
Q

Gastrulation

A

in 3rd week
trilaminar disk is formed by epiblast cells migrating and invaginating/differenciating intwo three layers

22
Q

Notocord

A

Solid rod of cells running in the midline of the mesoderm
from where the primitive streak was
required to form the neurotube

23
Q

Neural tube

A

formed from notocord forming a neural plate, and the edges curl and from the neurotube

24
Q

Somite

A

a block of mesoderm
organises itself into dermomyotome and sclerotome
Gives rise to repeating structures and guids innervation

25
Q

Dermotome

A

forms skin/dermis

26
Q

Myotome

A

Forms muscles

27
Q

Sclerotome

A

Forms hard tissue e.g bones

28
Q

Buccipharyngeal membrane

A

Future mouth

29
Q

Embryonic folding

A

Draws together the trilamnar disk margins
Creates a ventral body wall
Embryo becomes suspended within the amniotic sac
Pulls connective stalk ventral

Body Log Glossary (5 decks)

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