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A Embryology (General) > Lecturio 4. Mesoderm Derivatives > Flashcards

Lecturio 4. Mesoderm Derivatives Flashcards

1
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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2
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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3
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

Neural tube and neural crest cells migrated into (1)____; rest on sides of (2)___

A
  1. the mesoderm
  2. the paraxial mesoderm
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4
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

___ and ___ migrated into the mesoderm; rest on sides of the paraxial mesoderm

A

Neural tube and neural crest cells

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5
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

How are somites formed?

A

They are distinctive bulges formed by paraxial mesoderm

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6
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

How many types of somites can we see?

A
  • 4 occipital somites
  • 8 cervical somites
  • 12 thoracic somites
  • 5 lumbar somites
  • 5 sacral somites
  • coccygeal somite
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7
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

Somites are then separated into 3 regions. What are they?

A
  1. Dermatome
  2. Myotome
  3. Sclerotome
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8
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

Somites are then separated into 3 regions.

→ Dermatome becomes (1)___, which originates from (2)____

A
  1. The dermis that underlies the epidermis
  2. The overlying ectoderm
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9
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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10
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A

Dermatome

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11
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

Somites are then separated into 3 regions.

→ Myotome will become ____

A

The muscles of the back, trunk and limbs

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12
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

Somites are then separated into 3 regions.

→ Sclerotome will become ___

A

The vertebrae, intervertebral discs, meninges, and ribs

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13
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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14
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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15
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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16
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

___ proliferates and form a rough model of the vertebrae

→ In the process, it will surround by the neural tube and notochord

→ The mesenchyme will be replaced by cartilage and bone

A

The mesenchyme of the sclerotome

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17
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

The mesenchyme of the sclerotome proliferates and form a rough model of ____

A

the vertebrae

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18
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

The mesenchyme of the sclerotome proliferates and form a rough model of the vertebrae

→ In the process, it will surround by ___ and ____

A

the neural tube and notochord

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19
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

The mesenchyme of the sclerotome proliferates and form a rough model of the vertebrae

→ In the process, it will surround by the neural tube and notochord

→ The mesenchyme will be replaced by ___ and ____

A

cartilage and bone

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20
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

→ Identify

A
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21
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

  1. The ventral and central regions will form ____
  2. The lateral region will form ____
A
  1. the body and pedicles of the vertebrae
  2. transverse processes and ribs
22
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

  1. Which region(s) will form the body and pedicles of the vertebrae
  2. Which region(s) will form transverse processes and ribs
A
  1. The ventral and central regions
  2. The lateral region
23
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

  1. The dorsal region will form___
  2. The medial region in contact with the the neural tube all become ____
A
  1. the laminae and spinous processes
  2. the meninges, the supporting membranes of the spinal cord
24
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

  1. Which region will form the laminae and spinous processes?
  2. Which region in contact with the the neural tube all become the meninges, the supporting membranes of the spinal cord?
A
  1. The dorsal region
  2. The medial region
25
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

As the somites are forming the body wall folds, the intermediate mesoderm just lateral to it will differentiate into ___

A

kidneys, ovaries and testes.

26
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

As the somites are forming the body wall folds, _____ will differentiate into kidneys, ovaries and testes.

A

kidneys, ovaries and testes.

27
Q

Mesoderm derivatives - Paraxial and Intermediate Mesoderm

As the somites are forming _____, the intermediate mesoderm just lateral to it will differentiate into kidneys, ovaries and testes.

A

the body wall folds

28
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

→ Identify

A
29
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

As the body cavities form, the intermediate mesoderm gives rise to ___ and ____ that is in contact with the intraembryonic cavity

A

the nephrogenic cord

the urogenital ridge

30
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

As the body cavities form, the intermediate mesoderm gives rise to the nephrogenic cord and the urogenital ridge that is in contact with ____

A

the intraembryonic cavity

31
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

As the body cavities form,___ gives rise to the nephrogenic cord and the urogenital ridge that is in contact with the intraembryonic cavity

A

the intermediate mesoderm

32
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

→ Identify

A
33
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

How are coelomic spaces develop?

A

On day 19, they develop in the lateral plate mesoderm

34
Q

Mesoderm Derivatives - Paraxial and intermediate mesoderm

→ IDENTIFY

A
35
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ By day 20, coelomic spaces will enlarge and combine to form ___

A

intraembryonic coelom

36
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ By day 20, coelomic spaces will enlarge and combine to form a large intraembryonic coelom

→ The effectively splits the lateral plate mesoderm into 2 layers. What are they?

A

A somatic layer and a visceral layer

37
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ By day 20, coelomic spaces will enlarge and combine to form a large intraembryonic coelom

→ The effectively splits ____ into 2 layers: A somatic layer and a visceral layer

A

The lateral plate mesoderm

38
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→Identify

A
39
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

By day 21, the somatic layer of the lateral plate mesoderm associates with the ectoderm, collectively called ___

A

the somatopleure

40
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

By day 21, the ___ layer of the lateral plate mesoderm associates with the ectoderm, collectively called the somatopleure

A

somatic

41
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

By day 21, the somatic layer of the lateral plate mesoderm associates with ___, collectively called the somatopleure

A

the ectoderm

42
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

What is the splanchnopleure?

A

The visceral layer associates with the encoders

43
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ Identify

A
44
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ Identify

A
45
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ Starting on Day 22, the somatopleure begins sweeping inferiorly on both sides and wraps around ____

A

Splanchnopleure

46
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ Starting on Day 22, the somatopleure begins sweeping inferiorly on both sides and wraps around Splanchnopleure

→ This has the effect of pulling ___and _ with it to surround the embryo

A

the amnion and amniotic cavity

47
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

By the day 24, the somatopleure has swept low enough to partially surround (1)___

→ The endoderm is also pinching together, allowing (2)____ to surround it

A
  1. the intermediate mesoderm.
  2. the somatopleure
48
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

By the day 24,____ has swept low enough to partially surround the intermediate mesoderm.

→ The endoderm is also pinching together, allowing the somatopleure to surround it

A

the somatopleure

49
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

→ IDENTIFY

A
50
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall

On the day 26, the somatopleure on each side has grown together

→ creating (1)____

→ enclosing the (2)___and __

A
  1. the anterior body wall
  2. The intraembryonic coelom and the endoderm
51
Q

Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall - DAY 26

→ IDENTIFY

A
52
Q

The lateral mesoderm is responsible for the formation of ___ (4)

A
  1. Limbs
  2. Heart
  3. Lungs
  4. Different intra-abdominal organs

A Embryology (General) (13 decks)

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