One small animal, studied from the outside to the inside.
3 lessons, about 1 h 20 min3 simulations11 problems3 practice questionsPython in every lesson
The cockroach is a small animal that is found in kitchens, and it is also a fine example of how a body is built. This lesson walks around its body from head to tail, then follows the food through its alimentary canal and names the parts of the foregut, the midgut and the hindgut.
A cockroach has no lungs and its blood does not carry oxygen. This lesson explains the open blood system, the air tubes that carry oxygen straight to the cells, the tubes that remove wastes, and the nerve cord and sense organs of the cockroach.
A cockroach starts life as a tiny egg inside a capsule, and grows by shedding its skin. This lesson follows the reproduction of the cockroach from the reproductive organs to the egg capsule and the nymph. Then the earthworm and the frog are set beside it, in a table.
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