THE STAGES OF DEVELOPMENT INSIDE A CHICKEN EGG

THE STAGES OF A DEVELOPING CHICKEN EGG ARE PRACTICAL

THEY ARE MANY SYMPTOMS

BLOOD RING

BLOOD SPOT

OR UNDERDEVELOPED EGG (INFERTILE)

STAGES OF A FERTILIZED AND UNFERTILIZED EGG (INFERTILE, FERTILE)

1: THE EGG IS FERTILE. EGGS THAT ARE FERTILE CONTAIN AN EMBRYO (BLASTODERM) AND IS USUALLY A

LIGHT DISC FORMING THE TOP OF THE YOLK

2: EGG IS INFERTILE. GENERALLY IS A SMALL LIGHT SPOT THAT APPEARS AS GERM CELLS

STAGES OF AN EGG (1 DAY TO 72 HOURS)

1: EGG AT DAY 1 OF DEVELOPMENT. WHEN EGGS ARE FERTILIZED, AN EMBRYO APPEARS AS A SMALL LIGHT SPOT THAT IS FOUND IN THE TOP OF THE YOLK. THE

EMBRYO HAS GERMINAL CELLS

2: 2 DAYS. THE EGG YOLK IS QUITE THE LARGEST PART OF ANY YOLK OF ANY ORGANISM. THE BLOOD VESSELS ARE QUITE SMALL AND THE LITTLE EMBRYO

IS COLORED RED DUE TO BLOOD SUPPLY

3: 3 DAYS. BY 3 DAYS THE BLOOD VESSELS BRANCH MOSTLY ON THE YOLK, THEY ARE COLLATERAL. THE BLOOD VESSELS ARE QUITE VISIBLE AND THE EMBRYO IS SHAPED LIKE A QUESTION MARK. AT THE MOST

VITAL SOURCE OF FOOD IS THE YOLK, THAT NEEDS IT TO LIVE. THE HEART BEATS ARE VISIBLE WHEN THE

EMBRYO IS ALIVE

STAGES OF AN EMBRYO (1 DAY TO 3 DAYS)

1: 24 HOURS. AN EMBRYO OF THIS STAGE, IS MADE OF NERVOUS, SOMITIC, AND SOME TISSUE EVIDENT ON

THE BODY. IT INCLUDES THE SOMITES, BRAIN, NOTOCHORD, AND EVEN THE CEPHALIC (HEAD FOLD). FOR THIS STAGE, IT STARTS THE FORMATION OF THE

NERVOUS SYSTEM

2: 33 HOURS. THIS STAGE COMPRISES THE SOMITES, THE BRAIN, THE TAIL AND THE TUBULAR HEART. THE HEART IS S SHAPED WHEN THE EMBRYO GROWS TO A

CONSIDERABLE AMOUNT OF HOURS (33) AND TWISTS TO

FORM THE HEART. THEY ARE 13 SOMITES IN THIS STAGE

3: 48 HOURS. THE HEAD HAS TURNED BY THE LEFT SIDE. THE BRAIN IS MORE DEVELOPED AND THE EYES ARE CLEARLY DEFINED. THE HEAD IS MORE TWISTED TO THE LEFT THAN IN THE TRUNK AND THE TAIL

4: 72 HOURS. THE BRAIN IS GROWING CONSIDERABLY AND THE EYES ARE GETTING LARGER. THE ALLANTOIS IS NOT CLEARLY DEFINED, SAID SCIENTISTS THE EMBRYO HAS A SMALL ALLANTOIS FOUND IN THE

CLOACAL REGION. IT HELPS THE EMBRYO TO STORE WASTE FLUIDS ON ITS BODY. THE BODY TRUNK HAS TURNED TO THE LEFT SIDE, EXCEPT FOR THE TAIL

STAGES OF AN EMBRYO (4-10 DAYS)

1: 4 DAYS. THE ALLANTOIS IS A LARGE VESICULAR SAC THAT CONTAINS WASTE PRODUCTS FOR THE LIVING EMBRYO. THE EMBRYO IS SHAPED LIKE A C THAT OF A

LETTER, ALTHOUGH IT RESEMBLES MORE LIKE AN EMBRYONIC LIZARD. THE 4 LIMBS ARE SEEN

THROUGHOUT THIS DAY. ALSO IT SPORTS A EYE

2: 5 DAYS. THE EMBRYO HAS A SMALL SIZE AND DESPITE IT DOES NOT HAVE PECULIAR LOOK THIS

MIGHT BE A SENSE. THE EYES ARE MORE VISIBLE AND DARKENED, AND AS WELL AS ELBOWS AND KNEES

VISIBLE ON LIMBS

3: 6 DAYS. THE PROMINENCE AT THE HEAD OF THE EMBRYO IS A BRAIN LOBE. THIS WILL SHRINK WHEN THE EMBRYO GROWS, ESPECIALLY IN 8 DAYS. THE

PRIMITIVE BEAK IS GROWING OFF THE HEAD

4: 7 DAYS. THE EMBRYO HAS VISIBLE LIMBS AND LARGE EYES. THE LIMBS HAVE NOW DIGITS AND TOES,

THE THIRD TOE AND THE SECOND DIGIT ARE THE LONGEST. FEATHER GERMS INDISTINCT, BUT

SCIENTISTS THAT THE FEATHER GERMS SPROUT ON THE BODY

5: 8 DAYS. THE FEATHERS OF THE CHICK SPROUT FOR THE FIRST TIME, APPEAR AS TINY PAPILLAE. THE TOES AND THE FINGERS ARE LONGER. THE EMBRYO

STARTS LOOKING LIKE A BABY BIRD

6: 9 DAYS. MORE LIKE A CHICK, BUT WITH LITTLE FEW NOTICEABLE CHANGES. THE EYES FORM RIMS OF TISSUE, CALLED EYELIDS AND THEY ARE LARGER IN

SIZE RELATION TO BODY. THE TOES, AND THE FINGERS ARE LONGER THAN THE REST OF THE LIMB

COMPONENTS

7: 10 DAYS. FEATHERS FORM ON THE BODY. DIGITS ARE NOTICEABLY LONGER. THE TAIL FEATHER GERMS

SPROUT. THE EYELIDS ARE VISIBLE. BEAK IS LONGER, WITH FIRST FORMATION OF THE COMB LOCATED AT THE ANGLE OF THE UPPER BEAK

STAGES OF AN EMBRYO (11-20 DAYS)

1: 11 DAYS. THE FEATHERS OF THE CHICK ARE COVERING PARTLY, ESPECIALLY THE TAIL. CLAWS ON

TOES BEGIN TO APPEAR

2: 13 DAYS. THE FEATHERS COVER THE BODY ARE NEARLY COVERING THE CHICK ITSELF. THE BODY IS LIGHTLY COVERED IN FEATHERS. THE LEGS FORM

SCALES

3: 15 DAYS. BY NOW THE CHICK IS COVERED IN DOWNY FEATHERS. THE FEATHERS ARE QUITE LONGER AND EXTEND TO THE LENGTH THAT OF THE PREVIOUS STAGES. MORTALLY, THIS CHICK COULD NOT SURVIVE

BECAUSE IT WAS OPENED IN THE SHELL

4: 17 DAYS. FOR THIS SIZE, THE CHICK OCCUPIES NEARLY ALL SPACE IN THE EGG BUT NOT THE AIR

CELL. IT BEGINS TO MOVE UNDER THE EGG AND TUCKS ITS HEAD NEAR THE WINGS. THE FEATURE IS KNOWN AS HATCHING POSITION. THE CHICK LETS ANYTHING

TO MOVE INSIDE THE EGG

5: 19 DAYS. THE CHICK BEGINS TO ABSORB ITS NUTRIENTS FROM THE YOLK, AND ENTERS THE BODY CAVITY. ALMOST EVERY AVAILABLE SPACE FROM THE EGG IS CHICK, WHICH GREATLY AVAILS SPACE.

HOWEVER IT IS TIME TO HATCH WHEN THE CHICK HAS ENOUGH SPACE

6: 20 DAYS. THE EGG IS NOW CHICK INSIDE IT, HOWEVER IT BEGINS THE FIRST TIME IT HATCHES.

THE CHICK PECKS THE EGG USING ITS BEAK, CUTTING THROUGH THE SHELL AND FORMS A LID, AND LETS THE CHICK TO HATCH. AFTER HOURS THE CHICK DRIES ITS

FEATHERS AND EXTERNALLY APPEARS

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