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Which animal phylum was the first to have a circulatory system?
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∙ 12y ago
Annelida
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∙ 12y ago
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What would have happened if humans had not developed a circulatory system?
Humans didn't develop a circulatory system. Early forms of circulatory systems developed in the first animals and organisms to roam the earth. As these species evolved through speciation and genetic variation, new species came to exist that also had circulatory systems. Over time, the systems became more complex and efficient (compare the cardiopulmonary circulatory system of the human compared to the circulation of a fish). Therefore, without circulatory systems there would be no humans nor would there be life as we know it
Where can you find a circulatory system poem?
search google for the poem look for the yahoo result the first one under it
In which phylum do you first see muscles and nerves in their simplest form?
Cnidarians
How are sugars transported?
Simple sugars are considered carbohydrates, like starches are, and effects the blood sugar. The circulatory system is responsible for transporting the sugar through the body, first out of the digestive tract and then into the cells.
When did Phylum Chordata first appear?
About 550 mya underwater, through fish with a backbone.
Which of the animal phyla was the first to evolve three germ layers?
The first animal phylum to evolve three germ layers was the Cnidaria. These germ layers are the ectoderm, endoderm, and mesoderm, found in more complex animals for the development of different structures and organs.
Who first studied about the circulatory system in man?
Mr Bobadev
Who was the first person to explain the circulatory system?
William Harvey
Animal kingdom Name the first phylum that exhibits true tissues?
The first phylum that exhibits true tissues is the Cnidaria phylum, which includes animals like jellyfish and corals. These animals have specialized cells that work together to perform specific functions, marking an important evolutionary development in the animal kingdom.
Who first found out about circulatory system?
W. H . Harway , and Malpighi .
Is phylum a name of the first level in the classification system.?
No, the highest level is kingdom.
What is the first use of circulatory system?
To move blood around the body, to and from the heart.
Who first proposed that humans have a closed circulatory system?
i believe it was william harvey
What part of the circulatory system is big as your first and is found in your chest cavity?
the heart
Which plants first developed a circulatory system?
Mosses and worts are non-vascular. The ferns were the first plant species to develop a circulatory system that lets them grow larger. They have roots, leaves, stems, and trunks. With their new vascular system, the sky was the limit for plants.
How do nutrients pass from the digestive system to the circulatory system?
They go first to the liver via the hepatic portal vein.
What is the first phylum with a complete digestive system?
incomplete= cniderians and platyhelminthes complete = every other metazoan. e.g. nematoda, mammals, etc
