A hydra removes undigested food by pulling the food out with it's tentacles.
Hypothalamus. Hypothalamus, besides controlling hunger, also, controls thirst, body temperature, sleep, emotional, physical, instinctive and reproductive behavior. Through pituitary is associated whit endocrine system, which is one of most important functions of hypothalamus.
Answer:
a. Any of the fine branching of blood vessels that network between arterioles and venules
Archeology is a science because it is based on real facts and empirical research including research and scientific methods. It would be pseudoscience if it was based on belief, magic, supernatural things, or anything similar.
