@7w5d

Embryo 7+ Week(Carnegie Stage 19)
48 - 51 days, 16 - 18 mm

Features: Eyelid, eye, external acoustic meatus, auricle of external ear, digital ray, wrist, liver prominence.
Identify: Straightening of trunk, pigmented eye, eyelid, external acoustic meatus, digital rays, liver prominance, thigh, ankle, foot plate, umbilical cord.
Events: Ectoderm: sensory placodes, lens pit, otocyst, nasal pits moved ventrally, fourth ventricle of brain
Mesoderm: heart prominence, ossification continues
Head: forebrain, eye, external acoustic meatus.
Body:straightening of trunk, heart, liver, umbilical cord.
Limb: upper and lower limb buds, foot plate with digital rays, wrist, hand plate digital rays begin to separate.