Answer: Tympanic membrane.
Explanation:
Sound is a type of mechanical energy, the result of the transmission of energy from vibrating air particles from a sound source to more distant parts. Sound frequency is a concept that characterizes the pitch of a sound, defining it as low, medium or high. The tympanic membrane separates the outer ear from the middle ear. The main function of the outer ear is the protection of the eardrum membrane maintain a certain temperature and humidity balance necessary to preserve the elasticity of the membrane. Contributing to these functions are ceruminous cerumen-producing glands, hair, and epithelial migration from internal to external. The ossicles (hammer, anvil, and stirrup) form a bridge conducting the eardrum vibrations to the inner ear. At waves arrive in the form of amplified mechanical energy. The middle ear consists of the eardrum and three ossicles: hammer, anvil, and stirrup. It transfers through the ossicles the vibratory movement of the eardrum to the oval window of the cochlea.
The short term cycling<span> of </span>carbon<span> begins with </span>carbon<span> dioxide and the process of photosynthesis. Our atmosphere is mostly made of nitrogen and oxygen, but there is a small amount of </span>carbon<span> dioxide in the air too.
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Answer:
millipedes were the first of these animal groups to evolve.
Explanation:
Fossils are structural remains of animals from the past. As these animals die, it takes years for the remains to be buried.
The millipedes are at the lower layer of the rock, next to insects, amphibians, and then rodents. This shows that millipedes existed and evolved before the rest of the found animal fossils.
Exercise lowers modest amounts of blood glucose and boosts the body's sensitivity to insulin.
Blood glucose is the concentration of sugar dissolved in the blood of a person. It is the prime source of energy for the body. When the blood glucose is very high, the person is likely to be diabetic. Exercise is necessary to burn the excessive glucose molecules in order to gain energy for the exercise.
Insulin is a polypeptide which regulates the glucose levels in the body. It is secreted by the pancreatic cells called Islets of Langerhans. The structure is composed of two chains: A chain and B chain, joined together by the disulfide bonds.
To know more about blood glucose and insulin, here
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These are called sunspots, and appear regularly. They are cooler than the rest of the Sun's surface because of the extremely strong magnetic fields inside of them.
