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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
**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 \_\_\_
kidneys, ovaries and testes.
26
**Mesoderm derivatives - Paraxial and Intermediate Mesoderm** As the somites are forming the body wall folds, _____ will differentiate into kidneys, ovaries and testes.
kidneys, ovaries and testes.
27
**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.
the body wall folds
28
**Mesoderm Derivatives - Paraxial and intermediate mesoderm** → Identify
29
**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
the nephrogenic cord the urogenital ridge
30
**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 \_\_\_\_
the intraembryonic cavity
31
**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
the intermediate mesoderm
32
**Mesoderm Derivatives - Paraxial and intermediate mesoderm** → Identify
33
**Mesoderm Derivatives - Paraxial and intermediate mesoderm** How are **coelomic spaces** develop?
On day 19, they develop in the lateral plate mesoderm
34
**Mesoderm Derivatives - Paraxial and intermediate mesoderm** **→ IDENTIFY**
35
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** → By day 20, **coelomic spaces** will enlarge and combine to form \_\_\_
intraembryonic coelom
36
**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 somatic layer and a visceral layer
37
**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
The lateral plate mesoderm
38
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** →Identify
39
**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 \_\_\_
the somatopleure
40
**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
somatic
41
**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
the ectoderm
42
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** What is the splanchnopleure?
The visceral layer associates with the encoders
43
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** **→ Identify**
44
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** **→ Identify**
45
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** **→** Starting on Day 22, the somatopleure begins sweeping inferiorly on both sides and wraps around \_\_\_\_
Splanchnopleure
46
**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
the amnion and amniotic cavity
47
**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
1. the intermediate mesoderm. 2. the somatopleure
48
**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
the somatopleure
49
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall** **→ IDENTIFY**
50
**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** \_\_
1. the anterior body wall 2. The intraembryonic coelom and the endoderm
51
**Mesoderm Derivatives - Lateral Plate Mesoderm and Body Wall - DAY 26** **→ IDENTIFY**
52
The lateral mesoderm is responsible for the formation of ___ (4)
1. Limbs 2. Heart 3. Lungs 4. Different intra-abdominal organs

A Embryology (General) (13 decks)

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