noahwaitsowl357
02.12.2020 •
Biology
Microglia are:
1. wandering white blood cells, function is immune defense.
2. forming myelin sheaths to insulate axons.
3. forming the blood brain barrier.
4. producing CSF
He
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Ответ:
e) They perform gas exchange across their skin.
Explanation:
Annelids are organisms which are invertebrates and are worms. Examples
Include earthworm, rag worm and leeches.
They don’t have a gastrovascular cavity. They don’t have an open circulatory system, instead it operates on a closed circulatory system.They lack pseudocoeloms which is the space between the endoderm and mesoderm. They however exchange gases through their moist skin.