Fill in the table “Features of the internal structure of fish”.

Organ system name Structural features
Respiratory system Represented by gills
Digestive system It starts with the mouth, there are teeth in the mouth.
Circulatory system They have 1 circle of blood circulation and 2 chambers in the heart
Excretory system Paired kidneys are present
Musculoskeletal system There is an axial skeleton represented by a spine, there are ribs, fins, a tail
Nervous system Brain and sense organs
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