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These organisms are very simpleand they do not require a circulatory system. Since their body wall is very thin, they are surrounded by water. Substnces can easily diffuse in and out of the body. Their simple structure helps them in circulation.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agooxygen and nutrients are transported by water that circulates through their bodies.and nutrients reach every part of the cell by diffusion.
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How would you describe the difference in responsiveness between hydra and sponges?
Hydra are in phylum Cnidarian group and sponges are in the phylum Porifera. The responsiveness of hydra is to external stimuli while sponges is more simple.
What type of reproduction occurs in the hydra?
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What are the differences between a hydra and a planarian?
The fertilization occurs externally
What are organisms that use budding?
hydras, sponges, flowers or any plants... many cells also
Can you give examples of organism that reproduce by budding?
Organisms, such as single-celled yeasts, sponges, and hydra can produce offspring by budding.
The absorption and circulation of materials in a hydra are most similar to the absorption and circulation of materials in a?
2. protozoan
Which animals does not have nervous system?
A ganglia is a collection of nerve cell bodies. The hydra do not have ganglia. Instead, they have special cells for detecting touch.
Which of the following creatures has no blood but respires 1 fish 2 earthworm 3 hydra 4 cockroach?
All animals respire, but some simple animals, such as cnidarians (anemones, jellyfish, and relatives), and sponges don't have blood.
What are examples of multicellular organisms that reproduce by budding?
Generally prokaryotes show budding, but some eukaryotes also reproduce by budding e.g. prokaryote: bacteria eukaryote: fungi
What is the scientific name for hydra?
Hydra or Hydra
What has a nervous system but no brain 1 earthworm 2 hydra 3 cockroach 4 amoeba?
hydraMany lower invertebrates lack a brain but do possess a central nervous system. These include jellyfish, starfish, and sponges.
What is hydra circulatory system?
the hydras and sponges do not have a circulatory system.because, the water in which they live brings all the food and oxygen when it enters their bodies. It also carries away all the waste products and carbon dioxide when it moves out.
