2011 Lab 10 - Late Embryo: Difference between revisions
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| [[File:Stage_22 image 055.jpg|200px]] | | [[File:Stage_22 image 055.jpg|200px]] | ||
| [[:File:Stage_22 image 055.jpg|A6L]] | | [[:File:Stage_22 image 055.jpg|A6L]] | ||
| Cornea. | | '''Identify -''' Cornea. Anterior chamber. Lens. Vitreous body. Sensory retina. optic ventricle (artefact). Pigment epithelium. | ||
Conjunctival sac. Primordium of lacrimal glands (near lateral fornix of conjunctival sac). | Conjunctival sac. Primordium of lacrimal glands (near lateral fornix of conjunctival sac). | ||
Line 23: | Line 23: | ||
| [[File:Stage_22 image 056.jpg|200px]] | | [[File:Stage_22 image 056.jpg|200px]] | ||
| [[:File:Stage_22 image 056.jpg|A7L]] | | [[:File:Stage_22 image 056.jpg|A7L]] | ||
| Medial rectus muscle. Primordium of nasolacrimal ducts. | | '''Identify -''' Medial rectus muscle. Primordium of nasolacrimal ducts. | ||
Upper eyelid (lateral). Lower eyelid (medial). | Upper eyelid (lateral). Lower eyelid (medial). | ||
Line 29: | Line 29: | ||
| [[File:Stage_22 image 057.jpg|200px]] | | [[File:Stage_22 image 057.jpg|200px]] | ||
| [[:File:Stage_22 image 057.jpg|B1L]] | | [[:File:Stage_22 image 057.jpg|B1L]] | ||
| Optic nerve. Note extensive temporal region of retina. | | '''Identify -''' Optic nerve. Note extensive temporal region of retina. | ||
Primordium of nasolacrimal ducts. | Primordium of nasolacrimal ducts. | ||
Line 36: | Line 36: | ||
| [[File:Stage_22 image 058.jpg|200px]] | | [[File:Stage_22 image 058.jpg|200px]] | ||
| [[:File:Stage_22 image 058.jpg|B2L]] | | [[:File:Stage_22 image 058.jpg|B2L]] | ||
| Medial and lateral rectus muscles. Pigment epithelium. | | '''Identify -''' Medial and lateral rectus muscles. Pigment epithelium. | ||
Note relationship of eye to nasal capsule, sphenoid cartilage and trigeminal ganglion. | Note relationship of eye to nasal capsule, sphenoid cartilage and trigeminal ganglion. | ||
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| [[File:Stage_22 image 059.jpg|200px]] | | [[File:Stage_22 image 059.jpg|200px]] | ||
| [[:File:Stage_22 image 059.jpg|B3L]] | | [[:File:Stage_22 image 059.jpg|B3L]] | ||
| On left | | '''Identify -''' On left course of maxillary division of trigeminal in relation to position of eye (superior to this level). | ||
|- | |- | ||
|} | |} | ||
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| [[File:Stage_22 image 059.jpg|200px]] | | [[File:Stage_22 image 059.jpg|200px]] | ||
| [[:File:Stage_22 image 059.jpg|B3L]] | | [[:File:Stage_22 image 059.jpg|B3L]] | ||
| Rhombic lip (developing cerebellum). IVth ventricle. Trigeminal ganglion. Adenohypophysis. Sphenoid cartilage. | | '''Identify -''' Rhombic lip (developing cerebellum). IVth ventricle. Trigeminal ganglion. Adenohypophysis. Sphenoid cartilage. | ||
|- | |- | ||
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| [[File:Stage_22 image 060.jpg|200px]] | | [[File:Stage_22 image 060.jpg|200px]] | ||
| [[:File:Stage_22 image 060.jpg|B4L]] | | [[:File:Stage_22 image 060.jpg|B4L]] | ||
| Cochlear duct and temporal cartilage. Semicircular duct (ampulla on L). precartilage of auricle (pinna). malleus (medial, L). Incus (lateral, L). | | '''Identify -''' Cochlear duct and temporal cartilage. Semicircular duct (ampulla on L). precartilage of auricle (pinna). malleus (medial, L). Incus (lateral, L). | ||
|- | |- | ||
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| [[File:Stage_22 image 061.jpg|200px]] | | [[File:Stage_22 image 061.jpg|200px]] | ||
| [[:File:Stage_22 image 061.jpg|B5L]] | | [[:File:Stage_22 image 061.jpg|B5L]] | ||
| Extemal auditory meatus. Auricle. | | '''Identify -''' Extemal auditory meatus. Auricle. | ||
Incus (dorsal). Malleus (ventral). Tubotympanic recess (auditory rube). Tensor tympani m. (L). Utricle. | Incus (dorsal). Malleus (ventral). Tubotympanic recess (auditory rube). Tensor tympani m. (L). Utricle. | ||
Line 84: | Line 84: | ||
| [[File:Stage_22 image 062.jpg|200px]] | | [[File:Stage_22 image 062.jpg|200px]] | ||
| [[:File:Stage_22 image 062.jpg|B6L]] | | [[:File:Stage_22 image 062.jpg|B6L]] | ||
| External auditory meatus. Primordium of tympanic membrane (L). | | '''Identify -''' External auditory meatus. Primordium of tympanic membrane (L). | ||
Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube. | Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube. | ||
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| [[File:Stage_22 image 054.jpg|200px]] | | [[File:Stage_22 image 054.jpg|200px]] | ||
| [[:File:Stage_22 image 054.jpg|A5L]] | | [[:File:Stage_22 image 054.jpg|A5L]] | ||
| Olfactory bulbs. | | '''Identify -''' Olfactory bulbs. | ||
|- | |- | ||
| [[File:Stage_22 image 055.jpg|200px]] | | [[File:Stage_22 image 055.jpg|200px]] | ||
| [[:File:Stage_22 image 055.jpg|A6L]] | | [[:File:Stage_22 image 055.jpg|A6L]] | ||
| Interorbital ligament. nasal septum. primitive olfactory epithelium. | | '''Identify -''' Interorbital ligament. nasal septum. primitive olfactory epithelium. | ||
|- | |- | ||
| [[File:Stage_22 image 056.jpg|200px]] | | [[File:Stage_22 image 056.jpg|200px]] | ||
| [[:File:Stage_22 image 056.jpg|A7L]] | | [[:File:Stage_22 image 056.jpg|A7L]] | ||
| | | '''Identify -''' nasal capsule, nasal conchae, nasal septum, nasolacrimal duct. | ||
|- | |- | ||
| [[File:Stage_22 image 057.jpg|200px]] | | [[File:Stage_22 image 057.jpg|200px]] | ||
| [[:File:Stage_22 image 057.jpg|B1L]] | | [[:File:Stage_22 image 057.jpg|B1L]] | ||
| | | '''Identify -''' nasal capsule, nasal conchae, nasal septum, nasolacrimal duct. | ||
|- | |- | ||
| [[File:Stage_22 image 058.jpg|200px]] | | [[File:Stage_22 image 058.jpg|200px]] | ||
| [[:File:Stage_22 image 058.jpg|B2L]] | | [[:File:Stage_22 image 058.jpg|B2L]] | ||
| Vomeronasal organs (dark spots) beside nasal septum. | | '''Identify -''' Vomeronasal organs (dark spots) beside nasal septum. | ||
|- | |- | ||
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| [[File:Stage_22 image 059.jpg|200px]] | | [[File:Stage_22 image 059.jpg|200px]] | ||
| [[:File:Stage_22 image 059.jpg|B3L]] | | [[:File:Stage_22 image 059.jpg|B3L]] | ||
| Nasolacrimal ducts | | '''Identify -''' Nasolacrimal ducts | ||
|- | |- | ||
| [[File:Stage_22 image 060.jpg|200px]] | | [[File:Stage_22 image 060.jpg|200px]] | ||
| [[:File:Stage_22 image 060.jpg|B4L]] | | [[:File:Stage_22 image 060.jpg|B4L]] | ||
| Tongue | | '''Identify -''' Tongue | ||
|- | |- | ||
| [[File:Stage_22 image 061.jpg|200px]] | | [[File:Stage_22 image 061.jpg|200px]] | ||
| [[:File:Stage_22 image 061.jpg|B5L]] | | [[:File:Stage_22 image 061.jpg|B5L]] | ||
| Unfused | | '''Identify -''' Unfused palatal shelves either side of tongue. Section through mandible (top of image). | ||
|} | |} | ||
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===Hearing=== | ===Hearing=== | ||
[[File:Stage_22_image_159.jpg|400px]] | {| | ||
| [[File:Stage_22_image_159.jpg|400px]] | |||
[[File:Stage_22_image_159.jpg|120px]] [[:File:Stage 22 image 159.jpg|'''Selected Head Images''']]: [[:File:Stage_22_image_160.jpg|B4 - Choroid Plexus]] | [[:File:Stage_22_image_161.jpg|B5 - Cochlea]] | [[:File:Stage_22_image_162.jpg|B6 - Cochlea]] | [[File:Stage_22_image_159.jpg|120px]] [[:File:Stage 22 image 159.jpg|'''Selected Head Images''']]: [[:File:Stage_22_image_160.jpg|B4 - Choroid Plexus]] | [[:File:Stage_22_image_161.jpg|B5 - Cochlea]] | [[:File:Stage_22_image_162.jpg|B6 - Cochlea]] | ||
| | |||
* A pale cartilagenous region (that later ossifies) encloses the structuctures of the inner ear. | * A pale cartilagenous region (that later ossifies) encloses the structuctures of the inner ear. | ||
* Beside this region the middle ear bones are forming. | * Beside this region the middle ear bones are forming. | ||
* On the righthand side of the head the external ear is visible. | * On the righthand side of the head the external ear is visible. | ||
* The lower half of the image shows the developing brainstem with a large ventricular space occupied in part by an extensive choroid plexus (manufacturer of cerebrospinal fluid). | * The lower half of the image shows the developing brainstem with a large ventricular space occupied in part by an extensive choroid plexus (manufacturer of cerebrospinal fluid). | ||
|} | |||
===Embryonic External Ear=== | ===Embryonic External Ear=== |
Latest revision as of 14:49, 5 October 2011
2011 Lab 10: Introduction | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
Week 8
Vision
Section | Name | Description |
---|---|---|
A6L | Identify - Cornea. Anterior chamber. Lens. Vitreous body. Sensory retina. optic ventricle (artefact). Pigment epithelium.
Conjunctival sac. Primordium of lacrimal glands (near lateral fornix of conjunctival sac). Interorbital ligament. Nose. upper eyelids. | |
A7L | Identify - Medial rectus muscle. Primordium of nasolacrimal ducts.
Upper eyelid (lateral). Lower eyelid (medial). | |
B1L | Identify - Optic nerve. Note extensive temporal region of retina.
Primordium of nasolacrimal ducts. | |
B2L | Identify - Medial and lateral rectus muscles. Pigment epithelium.
Note relationship of eye to nasal capsule, sphenoid cartilage and trigeminal ganglion. Primordium of nasolacrimal ducts (cut obliquely). | |
B3L | Identify - On left course of maxillary division of trigeminal in relation to position of eye (superior to this level). |
Hearing and Balance
Section | Name | Description |
---|---|---|
B3L | Identify - Rhombic lip (developing cerebellum). IVth ventricle. Trigeminal ganglion. Adenohypophysis. Sphenoid cartilage. | |
B4L | Identify - Cochlear duct and temporal cartilage. Semicircular duct (ampulla on L). precartilage of auricle (pinna). malleus (medial, L). Incus (lateral, L). | |
B5L | Identify - Extemal auditory meatus. Auricle.
Incus (dorsal). Malleus (ventral). Tubotympanic recess (auditory rube). Tensor tympani m. (L). Utricle. Semicircular ducts. Intemal auditory meatus (R), containing vestibular and spiral ganglia. Endolymphatic sac (L). Note proximity of sac to choroid plexus of 4th ventricle. | |
B6L | Identify - External auditory meatus. Primordium of tympanic membrane (L).
Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube. Basal turn of cochlea duct (L). Endolymphatic sac (R). Common crus (R). Junction of utricle and saccule (R). |
Smell
Section | Name | Description |
---|---|---|
A5L | Identify - Olfactory bulbs. | |
A6L | Identify - Interorbital ligament. nasal septum. primitive olfactory epithelium. | |
A7L | Identify - nasal capsule, nasal conchae, nasal septum, nasolacrimal duct. | |
B1L | Identify - nasal capsule, nasal conchae, nasal septum, nasolacrimal duct. | |
B2L | Identify - Vomeronasal organs (dark spots) beside nasal septum. | |
B3L | Identify - Nasolacrimal ducts | |
B4L | Identify - Tongue | |
B5L | Identify - Unfused palatal shelves either side of tongue. Section through mandible (top of image). |
Vision and Hearing Selected Sections
A1 head and brain | A2 cortex | A3 eye | A4 optic nerve | A5 retina | A6 lens | A7 CN5 and endocrine |
B1 CN5 trigeminal | B2 pituitary | B3 auditory | B4 choroid plexus | B5 membranous labyrinth | B6 inner ear | B7 neck |
Hearing
|
|
Embryonic External Ear
Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).
References
2011 Lab 10: Introduction | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, May 19) Embryology 2011 Lab 10 - Late Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/2011_Lab_10_-_Late_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G