Term
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Definition
| thick plate of mesoderm on each side of the midline. becomes organized into segments known as somitomeres, which form in a craniocaudal sequence. |
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Term
| What does the sclerotome form later? |
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Definition
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Term
| What does the myotome form? |
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Definition
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Term
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Definition
| Dermis layer of different area |
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Term
| Head and neck musculature |
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Definition
| mderived from somitomeres 1-7 of head and neck region, which participate in the formation of the phaaryngeal arches. |
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Term
| What do somitomeres 1-7 form in the adult? |
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Definition
| They contribute to the mesoderm of the head and neck region. |
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Term
| What somitomeres produce the Extraocular Muscles? |
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Definition
| Derived from somitomeres 1,2,3, 5. Innervated by CNIII, IV, VI |
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Term
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Definition
| derived from myotomes in trucnk region and partition into dorsal epimeres and ventral hyupomeres |
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Term
| What do epimeres develop into? |
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Definition
| They develop into the intrinsic back muscles (erector spinae). and innerevated by dorsal rami of spinal nerves. |
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Term
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Definition
| Develop into the prevertebral, intercostal, and abdominal muscles. innervated by the vental rami of spinal nerves. |
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Term
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Definition
| derived from myotomes in upper limb bud region and lower limb bud region. |
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Term
| What does the Posterior Condensation develop into? |
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Definition
| Extensor and supinator musculatore of upper limb. Extensor and abductor musculatures of lower limb. |
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Term
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Definition
| Develops into the flexor and pronator musculature of upper limb. flexor and abductor musculature of lower limb. |
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Term
| Where does the smooth muscle of GI tract and tunica media develop from? |
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Definition
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Term
| Where does Cardiac Muscle develop from? |
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Definition
| Mesoderm which becomes myocardium. |
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Term
| Where does the mesoderm of the somites migrate and develop into? |
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Definition
| Limb bud and condenses to eventually form the musculature componenets of upper limbs |
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Term
| Future Limb mesodermal cells |
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Definition
| express the homeobox gene Hox 3.3 before there is any hint of limb bud formation. |
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Term
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Definition
| signals ectoderm at the tip of the limb bud to thicken and form the apical actodermal ridge. promotes outgrowth of limb bud by promoting mitosis and preventing terminal differentiation of mesodermal cells at tip of limb bud. |
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Term
| What is the polarizing activity? |
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Definition
| consists of mesodermal cells located at base of limb bud. directs organizationof limb bud and patterning of digits, involve retinoic acid vitamin A and homeobox gene Hox-4. |
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Term
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Definition
| occurs as a result of selected apoptosis within the AER suich that five separate regions of AER remian at the tips of the future digits. |
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Term
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Definition
| Aortic arch #4 forms the proximal part ofteh right subclavian artery. |
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Term
| 7th intersegmental artery |
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Definition
| forms the distal part ofthe right subclavian artery. forms the entire left subclavian artery. |
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Term
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Definition
| .1 Posterior interosseous artery and median artery. 2. Radial artery and ulnar artery 3. Aillary artery, brachial artery, anterior interosseous artery, and depp palmar arch |
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Term
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Definition
| A sedative and antinauseant that causes severe limb anomalies in infants. |
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