Dangers faced during natural circumstances
Answer: B) Contusions are damaged skin and blood vessels that form red or blue discolorations of the skin. Hematomas are ruptured blood vessels beneath the skin that bleed enough to form bumps and swelling under the skin.
Explanation:
Contusion or bruising results when the blood vessels are broken and the blood is leaked out and blood can be observed at the place where the injury actually occurred. The hematomas are the proof of injuries which are caused by the same reason as that of contusion but are larger than contusions. The contusions are dark red to brown in starting then turns blue to pale yellow on recovery. The hematomas are formed when large number of blood vessels are affected associated with swelling and bumps. Thus the skin appears raised.
1. Middle ear is made up of 3 small bones called malleus, incus, and strapes, it also has a tube called the Eustachian tube.
2. The cochlea is in charge of changing sound waves into electrical signals given to the brain to process.
3. The eardrum is in charge of making sound waves vibrate.
4. The ear canal is in charge of transferring sound waves to the tympanic membrane(eardrum).
