the symbiotic relationship that occurs between certain species of fungi and lichens (which are themselves symbiotic associations between a fungus and an alga)
[par-uh-sim-puh-thet-ik] /ˌpær əˌsɪm pəˈθɛt ɪk/ adjective, Anatomy, Physiology, 1. pertaining to that part of the autonomic nervous system consisting of nerves and ganglia that arise from the cranial and sacral regions and function in opposition to the system, as in inhibiting heartbeat or contracting the pupil of the eye. /ˌpærəˌsɪmpəˈθɛtɪk/ adjective 1. (anatomy, physiol) of […]
- Parasympathetic ganglion
parasympathetic ganglion n. Any of the ganglia of the autonomic nervous system composed of cholinergic neurons receiving afferent fibers originating from preganglionic visceral motor neurons in either the brainstem or the middle sacral segments of the spinal cord.
- Parasympathetic nerve
parasympathetic nerve n. One of the nerves of the parasympathetic nervous system.
- Parasympathetic nervous system
parasympathetic nervous system n. The part of the autonomic nervous system originating in the brain stem and the lower part of the spinal cord that, in general, inhibits or opposes the physiological effects of the sympathetic nervous system, as in tending to stimulate digestive secretions or slow the heart. parasympathetic nervous system (pār’ə-sĭm’pə-thět’ĭk) The part […]