somites and segmenta
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| what does mesoderm develop into? | muscle, connective tissue, cartilage and bone, blood and blood vessel, kidney, spleen, gonad, suprarenal cortex
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| where is mesoderm develop from? | Primitive streak
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| list 3 region of mesoderm | At day 17, the mesoderm is develop into
1) paraxial mesoderm
2) intermediate mesoderm
3) Lateral mesoderm
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| Paraxial Mesoderm | it thicken near midline, on each side of notochord and neural plate
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| Lateral mesoderm | it remains as think plate at the lateral edge of each side of germ disc
-develop into coelom
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| Intermediate mesoder | It develops into the component of urinary system
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| What is paraxial mesoderm develop into? | Somitomere
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| Somitomere differential into two part, which two | 1) The anterior region form beside a neural plate, neuromere, contirbute to Head Mesenchyme
2) the medial and posterior region ==> somites
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| Somites | -develope from medial and posterior region of somitomere
-first develop in Occipital region, proceed in posterior direction
-3 somites pair per day
-42-44 pair (4 occipital, 7 cervial, 12 thoracic, 5 saccral and 8-10 occygeal)
-they form skeleton
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| Which few pair of somites will disappear and does not contribute to skeleton? | first occipital and last 5-7 coccygeal
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| What does somites pairs contribute to? | Skeleton
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| Which region of somitomere develope into Head mesenchyme | anterior region which form around a neural plate segment (Neuromere)
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| Which region of somitomere contribute to skeleton | The medial and posterior which differentiate into Somites
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| Which 3 layers does somites differentiate into at week 4? | - Sclerotome
- myotome
- dermotome
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| Sclerotome | -develope from ventral and medial wall of somites which lost cohesion
-they are the mesenchymal cell that surround notochard
-produce vertebrae by differentiate into bone and cartilage
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| which part of somites does dermotome and myotome develop from? | Dermonyotome (the remaining dorsal wall of somites
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| what part of body segment does sclerotome, dermotome and myotome contribute to? | -Sclerotome: cartilage and bone of vertebrae
-Dermotome: the underlying dermis of skin
-Myotome: the muscle attach tot each vertebrae and limb
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