Traditional Culture Encyclopedia - Photography and portraiture - What are the animals without hearts? (Please give specific examples, thank you.)
What are the animals without hearts? (Please give specific examples, thank you.)
Nematodes consist of about 20-30 cells and have no heart. trichomonad
Porphyra is a primitive multicellular organism. Although its cells have begun to differentiate, they have not yet formed tissues and organs. sponge
Coelenterates, although cells have begun to differentiate, have not yet formed tissues and organs, and have a primitive nervous system. Hydra, jellyfish
Platycladus orientalis is the most primitive coelom triplet, with primitive excretory system and stepped nervous system. Mushrooms, trematodes, tapeworms
anguina tritici
Rotifer wheel microorganism
Echinocephala, prosthetic cavity animals. Spinhead worm
- Related articles
- Which industries are suitable for self-employment
The process of self-employment is actually a persistent and persevering development process, and there is no secret in it. To really start your
- Guangyuan civil servant recruitment information
- Star photography fairy tale
- About expressing the poem that has just begun (the poem that describes the beginning)
- Does Kono Hon Hai's children take a family photo and make up?
- Is it contagious for a woman to give birth to Alice's chair?
- What are the brands of men's clothing in Wenzhou Impression City?
- A lover who can be taken away is not a lover.
- What about the surrounding facilities of Qingcheng Community in Shunde, Foshan?
- What are the word combinations of color?