Biological messengers are molecules thatÊtransmit information about cells to the receptor. They are also called neurotransmitters, first messengers, or second messengers.
it delivers oxygen :)
there called your nerve cells NO...HORMONES R
there called your nerve cells NO...HORMONES R
No, a Capillary is a small blood vessel that delivers oxygen and other nutrients to cells.
Blood
Chemical messengers are molecules released by cells that travel through the bloodstream to target cells, where they bind to specific receptors and trigger a response. These messengers can include hormones, neurotransmitters, and cytokines, among others, and play a crucial role in regulating various physiological processes in the body.
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Paracrines
blood delivers oxygen to the cells
delivers oxygen and nutrients to your cells and takes away carbon dioxide and waste from your cells
interferons