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Earthworm, Homeostasis, Nervous System

Horizontales
secretes the hormone “melatonin” that initiates sleep.
canal-like where third ventricle is continuous with the fourth ventricle.
rib cage moves up and out and the diaphragm moves down.
saddle-like thickening that secretes mucus to form a cocoon in which eggs are deposited and also to keep the mating worms together.
removes toxins/wastes.
consists of the brain and spinal cord. It interprets sensory input and decides appropriate responses.
five hearts pumping blood down the dorsal vessel and returns by ventral vessel.
volume of air that can be forcibly exhaled after forcibly inhaling.
remove nitrogenous wastes from blood.
carries food to the crop.
divides the segmentation and holds the skin onto the worm.
chamber relaxes.
Verticales
transport nutrients, chemical messengers and waste products.
controls motor functions and permits voluntary muscle control; responsible for abilities to think, problem, solve, speak and smell.
carry impulses to and from the brain.
body is divided into a number of segments and has a ringed appearance.
carry impulses to and from the spinal cord.
destruction of tissue leaves little surface, few capillaries and large air spaces.
carry blood away from heart.
chamber contracts.