Embryology 2 Flashcards
1
Q
Surface Ectoderm forms the..
A
- Epidermis of skin
- Epidermal appendages
- Hair, nails, sweat glands, mammary glands
- Lens of eye
- Enamel of the teeth
- Anterior pituitary - Rathke’s pouch
2
Q
Neural Tube
A
- Forms brain and spinal cord
- Brain is the expanded cranial end (fore, mid, hind brain)
- Parts
- Canal: Forms the ventricles of the brain
- Nerve cell bodies (grey matter): Line the canal
- Motor: ventral
- Sensory: dorsal
- Nerves (white matter): On the outside
- Brain develops with more grey matter on the surface
3
Q
Neural Crest Ectoderm forms the…
A
- Peripheral Nervous system
- Adrenal medulla
- Autonomic ganglia
- Dorsal root ganglia
- All the nerves
- Shwaan cells (myelin sheath)
- Leptomeninges: Pia and Arachnoid meninges
- Melanocytes
- Dentine and Cornea
- Truncoconal septum of heart
4
Q
Paraxial Mesoderm
A
Types
- Dermatome
- Myotome
- Sclerotome
Migration
- Cells begin in paraxial position, then migrate
- Epimere: cells of dermatome + myotome that stay, become dermis + muscles of back
- Hypomere: cells of dermatome + myotome that migrate to the somatopleure, become dermis + muscles of the body and limbs
5
Q
Intermediate Mesoderm Origin
A
- Kidneys
- Adrenals
- Gonads
6
Q
Intermediate Mesoderm Nerve Supply
A
Autonomic nerves
- Parasympathetic nerves (Vagus & S234 Pelvic Splanchnic)
- Visceral branches of sympathetic trunk
7
Q
Intermediate Mesoderm Blood Supply
A
Paired branches of aorta
8
Q
Somatopleure forms the..
A
- Smooth muscle
- Connective tissue
- Glands of body wall and limbs
9
Q
Visceropleure forms the..
A
- Smooth muscle
- Connective tissue
- Glands of viscera of body cavities
10
Q
Somatopleure Nerve supply
A
Autonomic nerves: Grey Rami
11
Q
Visceropleure Nerve Supply
A
Autonomic nerves: Parasympathetic nerves (Vagus & S2, S3, S4 Pelvic Splanchnic, Visceral branches of sympathetic trunk
12
Q
Blood Supply of Somatopleure & Visceropleure
A
- Somatopleure: Body wall branches of aorta
- Visceropleure: Unpaired branches of aorta
