A closed circulatory system is present in organisms with a circulating body fluid that is distinct from the fluid that directly surrounds the body's cells.
<h3>What is the circulatory system?</h3>
The circulatory system is an organs system that works to carry out blood cells to all cells in the body.
The circulatory system is fundamental for transporting oxygen and nutrients to all cells of the body.
A closed circulatory system is a special organ system where the blood cells are not circulating in body cavities.
Learn more about closed circulatory systems here:
brainly.com/question/989029
I think the correct answer from the choices listed above is option D. Simple diffusion is the cell transport that allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being <span>required from the cell.</span>
I don’t know the answer but i can recommend two app that might
AP Bio
Cel Biology-101
Command economy can be define as an economy in which production, investment, prices, and incomes are determined by a government.Central government is responsible for all this.No other authorities are allowed to fix any of the above mentioned categories.
<span>All goods and services production is set through the central plan.</span>
