Examlex
Match these descriptions with the division of the nervous system they describe.
-The portion of the nervous system that connects to sensory receptors and to skeletal muscles.
A)autonomic nervous system
B)sympathetic nervous system
C)peripheral nervous system
D)somatic nervous system
E)central nervous system
Coelomic Fluid
A fluid found within the coelom, the body cavity of most animals, that serves various functions including circulation and the provision of a hydrostatic skeleton.
Mesoderm
The middle layer of an embryo in multicellular organisms, giving rise to muscles, bones, and the circulatory system among other structures.
Water-Vascular System
A network of hydraulic canals unique to echinoderms, such as starfish, used for locomotion, feeding, and respiration.
Exoskeleton
External skeleton of some invertebrates; hard external parts that muscles attach to and move.
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