Fill in the table “Features of the internal structure of birds.”
October 30, 2020
|Organ system name
|In addition to lungs, birds have pulmonary sacs, which provide double breathing.
|Birds have 2 circles of blood circulation and 4 chambers in the heart.
|The reproductive system of the female has an oviduct through which the egg goes
|Birds have several stomachs: glandular and muscular
|Represented by the kidneys
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