Please answer as many as possible! Thanks♡

number 8:

they form right angles just do a google search

number 9:

Crayfish turn blood into neurons. ... Olfactory nerves are continuously exposed to damage and so naturally regenerate

number 10: molting is the process of shedding and replacing the rigid exoskeleton and spiders are an animal that molts

Explanation:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.