When the circular muscles contract, the earthworm stretches, becoming longer and thinner. The earthworm uses its setae to anchor the front of its body in the soil. Now the longitudinal muscles contract and the earthworm becomes shorter and wider or it bends from one side to the other, pulling the body forward.
Noncolumnar patterns of blood flow with the interconnected vascular network.
The standard model of cortical columns has network has tightly linked vascular network. It graph was carefully studied and theoretically analyzed. The results concluded that the microvascular that forms the subsurface, has formed a topology by the interconnected loops. And it is consistent with the boundary and the position of columns.
Furthermore, it was calculated that the blood flow patterns in the cortical column network are not related to the column's location. Instead, to limit lateral perfusion venues were penetrated that drained the sourced blood effectively by penetrating the arterioles.
Therefore, this analysis helps in understanding the effect of penetration strokes of vessels and its functional imaging on the viability of the brain.
To know more about arteriole, refer to the below link:
brainly.com/question/3420464
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Answer:
A. Mutualism
Explanation:
<u>Mutualism</u> The bristle worm living with the hermit crab.
