Top 10 Foods Highest in Calories Written by Daisy Whitbread, MScN Calories are the basic unit of energy found in all foods and are necessary to maintain the body's vital functions or basal metabolic rate. The amount of calories a person needs depends on factors like their age, gender, and lean muscle mass.
Earthworms may appear to have radial symmetry because of their cylindrical shape, but DON'T BE FOOLED! They actually have BILATERAL symmetry. This is because they have an up and down (dorsal and ventral), and front and back (andterior and posterior).Linus Â· 9 years ago.Thumbs up.arthworms may appear to have radial symmetry because of their cylindrical shape, but DON'T BE FOOLED! They actually have BILATERAL symmetry. This is because they have an up and down (dorsal and ventral), and front and back (andterior and posterior). Linus Â· 9 years ago. Thumbs up.
Best Answer: The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessels. The aortic arches function like a human heart. There are five pairs of aortic arches, which have the responsibility of pumping blood into the dorsal and ventral blood vessels. The dorsal blood vessels are responsible for carrying blood to the front of the earthwormâs body.