|
Head
|
Flexed
|
Straight
|
Extended
|
|
Tail
|
Properly detached and straight
|
Normal length and curved
|
Short length and curved
|
|
Anterior-posterior (AP) axis
|
Normal head and tail position
|
AP axis mildly disrupted
|
AP axis not well formed
|
|
Yolk
|
Transparent
|
Bigger than control and/or deformed
|
At least double than size of control with necrosis
|
|
Heart beat
|
Regular with synchronous contractions
|
Slow or fast
|
Slow or fast with asynchronous contractions
|
|
Pericardial edema
|
Absent
|
Mild
|
Moderate to big
|
|
Blood circulation
|
Regular and continuous flow
|
Irregular and/or decreased flow
|
Absent flow
|
|
Somites
|
V-shaped
|
C-shaped
|
Straight
|
|
Chorda
|
Smooth, straight and well demarcated border
|
Tortuous border with bulging
|
Tortuous and not well demarcated border
|
