There aren’t many big changes going on in the eggs today. 

• Scales appear on the lower legs.

• The embryo continues to grow and move.

• The ribs begin to ossify.

This is a scan from the top of the egg showing the blood vessels supplying blood to the chick. 

Here is a link to Enchanted Learning’s heart anatomy lesson– a printable simple drawing of the heart and a glossary of terms. 

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