: development of an individual
from the moment the egg is fertilized up till adulthood.
: non-transparent part.
: transparent part.
: fold related to the head.
: extension related to the head.
: blood-pumping organ.
: vitelline duct.
: beginning of the formation of the wings.
: beginning of the formation of the legs.
EN : Feet
FR : Pieds
ES : Pies
Its feet of ostrich are very curious,
and different from those of all other birds. They are somewhat like the
foot of the camel, having a soft pad or cushion underneath, and only two
toes. The largest toe is about seven inches long, and has a broad claw
at the end; the other is about four inches long, and has no claw. Although
ostrich cannot fly, it can run faster than the swiftest horse.