There are two sets of nerves in your skin. The first type are somatosensory neurons that send sensory information to your central nervous syste. The second set consists of autonomic fibers that control smooth muscle in the skin and the blood vessels in the skin.
Explanation:
<u>the Paleozoic Era </u>
The Precambrian era describes a period of time that pre-dates Cambrian. This time typically references the entire period of the history of earth before the formation of rocks containing identifiable fossils occurred. It covers the majority of Earth’s history and is divided into the Hadean, Archean and the Proterozoic era.
Just before the Cambrian eruption, in the Paleozoic Era the environment was oxygenated, culminating in an explosion of new life in the Proteozoic Eon (2500-541 million years ago) in the form of primitive blue-green algae named cyanobacteria and oxygen based species. Multicellular species followed later, along with structure at higher levels, and complex life. Oxygen levels grew gradually over this period of time, from low levels.
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Answer:
Respiratory
Explanation:
they all come together and help with breathing and oxygen :)
I'm not completely sure about this answer because our unit on that was very short. So please don't be upset if its incorrect.
The answer is phytoplankton and water depth, because in order for any ecosystem to survive they need the producer population (Plants)
Middle School
Basic Rank
The circulatory<span> and </span>respiratory systems<span> work together to circulate </span>blood<span> and oxygen throughout the body. Air moves in and out of the </span>lungs<span> through the trachea, bronchi, and bronchioles. </span>Blood<span> moves in and out of the </span>lungs<span> through the pulmonary arteries and veins that connect to the heart
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