The air-filled spaces lined by mucous membranes found within flat and irregular bones in the body are called the sinuses.
<h3>What are bones?</h3>
The bones are the solid structures that we find in the body. The bones of a person are about two hundred and six in number. The primary function of the bones is to support the structure of the of the individual and to protect the vital and fragile structures such as the brain and the heart.
The air-filled spaces lined by mucous membranes found within flat and irregular bones in the body are called the sinuses.
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The answer would be 500 because every time the food chain goes up the energy goes down 10 times. Hope this helps :-)
The valves are responsible for preventing blood from flowing in the wrong direction, they are present in the veins, and the arteries don't need them because the aorta (biggest artery) pumps or in other words pushes it with such a force that no other force can change its direction, in the veins there is no structure present for pumping them as a result we have got valves so that they go in one direction...... the meaning of the word valve is to allow in one direction
The internal environment of a house is to thermostat as the human body is to hypothalamus
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Both parents must have carried at least one gene for PKU. I hope it helps and can you please mark my answer as brainliest thank you