Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Anatomy Chap 3,4,5
Prenatal Develp, Face & Neck Develp, Orofacial Struct Develp
| Question | Answer |
|---|---|
| 3 embryonic layers are called? | Trilaminar disc |
| Trilaminar disc is involved in | facial development |
| The embryonic layers (trilaminar disc)are | ectoderm, mesoderm, endoderm |
| Development of the face includes? | primitive mouth, mandibular arch, maxillary processes, frontonasal process, nose |
| Facial development depends on what 5 facial process (also called prominences)? | frononasal process, paired maxillary processes, paried mandibular processes |
| The processes surround? | embryo's primitive mouth |
| Adult face is divided into what portions? | thirds, upper, middle and lower |
| These portions roughly correspond to? | the centers of facial growth |
| Facial development starts and ends? | starts in the 4th week and will be completed later in the 12th week |
| Upper portion of the face is derived from? | frontonasl process |
| Middle portion of the face is derived from? | paired maxillary processes |
| Lower portion of the face is derived from? | paired mandibular processes |
| Most facial tissues develop by fusion of? | swelling tissues or tissues on the same surface if the embryo |
| Located between the adjecent swellings as they are created by growth, morphogenesis, differentiation are? | Cleft or groove |
| During fusion, groove are eliminated by underlying? | mesenchymal tissues migrate into the groove making the surface smooth |
| During fusion of grooves, mesenchyme grows and merges? | beneath the external ectoderm |
| The over all growth of face is? | inferior and anterior direction |
| Upper face growth is? | rapid |
| Middle and lower face grows? | slowly over prolong period of time |
| Upper face (forehead) ceases to grow? | after 12 years of age |
| Middle and lower face ceases to grow? | late puberty, eruption of 3rd molars (17-21 years of age) marks end of major growth. |
| Facial bone growth ceases? | depending on center of bone formation by intramembranous ossification |
| Definition of disintegration? | loss of unity, cohesion or integrity |
| Stomodeum initially appears as? | shallow depression in ectoderm at cephalic end before the 4th week. It is limited in depth by oropharyngeal membrane |
| Oropharyngeal membrane consists of? | external ectoderm overlying endoderm (which was formed by the third week) |
| Oropharyngeal membrane seperates the stomodeum from the? | primitive pharynx |
| The primitive pharynx is the cranial portion of the? | forgut |
| Disintegration of oropharyngeal membrane happens? | 4th week |
| Disintegration of oropharyngeal membrane increases? | depth in the primitive mouth |
| Disintegration of oropharyngeal membrane gives access to? | outside fluids from amniotic cavity to reach stomodeum and internal primitive pharynx |
| stomodeum gives rise to? | oral cavity which will be lined by oral epithelium |
| Within the 4th week the stomodeum has two bulges of tissue appear inferior to the primitive mouth? | mandibular processes |
| The mandibular processes consist of a core of | mesenchyme formed in part by neural crest cells that migrate to facial region |
| Paired mandibular processes fuse together to form the? | mandibular arch |
| In the midline of the mandibular arch is a faint ridge an indication of? | the mandibular symphysis |
| Mandibular arch is considered the first? | branchial arch |
| All branchial arches depend on? | neural crest cells for its formation |
| During growth of the mandibular arch cartilage forms? | within each side of the arch |
| Cartilage that grows on each side of the mandibular is is called? | Meckel's cartilage |
| Most of the mandibular cartilage disappears as? | the bony mandible forms by intramembranous ossification |
| The remaining mandibular cartilage participates in? | the formation of the middle ear bones (malleus & incus) |
| Mandibular arch gives rise to? | lower face, lower lip, mandible, mandibular teeth, associated tissues |
| Part of the perichondrium surrounding Meckel's cartilage becomes? | ligaments of the jaw and middle ear |
| The mesoderm of mandibular arch forms? | the mastication muscles, palatal muscles, and superhyoid muscles |
| Muscles derived from mandibular arch are innervated by? | the nerve of the first arch |
| The nerve of the first arch is? | the fifth cranial nerve, the trigeminal nerve |
| The mandibular arch is involved in the formation of the? | tongue |
| During the 5th and 6th week mandibular arch primitive muscle cells from mesoderm? | differentiate |
| Mandibular arch primitive muscles cells from mesoderm? | become oriented to site of masticatory muscles |
| During 7th week mandibular muscle mass has enlarged, cells mirgrate and differentiate into? | 4 muscles of mastication |
| 4 muscles of mastication are? | masseter, medial pterygoid, lateral pterygoid, temporalis muscles |
| Masseter and medial pterygoid cells form? | vertical sling that will form angle of the mandible |
| Temporalis muscle differentiates in? | temporal fossa & coronoid process |
| Lateral pterygoid muscle cells arise from the? | infratemporal fossa and extends horizontally into condylar neck and the articular disc |
| Nerve branches from trigeminal cranial nerve are? | incorporated early in mastication muscle masses |
Created by:
1573855843
Popular Anatomy sets