no
no
No, they only have a ventral blood vessel.
The earthorm has a closed circulatory system with five main blood vessels:Dorsal (above the digestive tract) - it moves blood forwardThe remaining four all move the blood to the rear of the earthworm: Ventral (beneath the digestive tract)Subneural Vessel (below the nerve cord)Right & Left Lateroneural vessels (either side of nerve cord)
The dorsal side of an earthworm is darker than the ventral side. This is because of the dorsal blood vessal that runs along the top of the digestive track and just under the skin. There is a ventral blood vessel, but it doesn't lie against the skin, but instead in between the ventral nerve cord and the digestive track.
there is not a ventral nerve cord
You don't. Blood samples are usually taken from a blood vessel.
it drains blood from the nerve cord n' stuff :)
The radial artery
Radial Artery
The blood vessel that sends electrical signals from the eye to the brain is not a blood vessel but rather the optic nerve. The optic nerve transmits visual information from the retina, where light is converted into electrical signals, to the brain for processing. This nerve plays a crucial role in vision, connecting the eye to the visual cortex in the brain.
the ventral root carries motor response
A ventral nerve cord can be found in on the bottom (or lay on the bottom) of the organisms, such as grasshoppers and earthworms. Hope this helps! - AJ