DAY

STAGE ACTION

CARNEGIE STAGE

ORIENTATION

IMAGE

LENGHT (mm)

28

Cranial

Caudal

Lateral view

4,0-6,0

Embryo, Carnegie stage 13, lateral view, ~day28

A characteristic C-shaped curvature
Four branchial (pharyngeal) arches
Upper and lower limb buds
A large heart is large
Division of heart into a primitive atrium and ventricle
Closure of rostral and caudal neuropores