Body Cavities and Serous Membranes

Pericardial cavity

surrounds heart, serous membrane of pericardial cavity is the pericardium

Ventral body is separated by the

diaphragm

thoracic cavity

top half ventral cavity

thoracic cavity contains

right pleural cavity, mediastinum, left pleural cavity, and pericardial cavity

abdominopelvic cavity contains

peritoneal cavity which includes the abdominal cavity and the pelvic cavity

the organs and the walls of the ventral cavity are lined with:

serous membranes that secrete fluid

what does the parietal layer of the membrane line

the cavity walls

what does the visceral layer of the serious membrane line

the surface of the organ

what is in between organs and cavity walls

serous fluid

parietal/visceral pleura

pleural cavity and lung surface

parietal/ visceral pericardium

pericardial cavity and heart surface

parietal/visceral peritoneum

abdominopelvic cavity and viscera inside it

What is part of the central nervous system

the brain and spinal cord

what is part of the peripheral nervous system

sensory and motor neurons

motor neurons in the somatic nervous system control

skeletal muscle

part of the somatic nervous system

skeletal muscle, touch, temperature, pain.

part of the autonomic nervous system

smooth muscle, cardiac muscle, glands. sensory for organs, and both parasympathetic and sympathetic nervous systems.

motor neurons in the autonomic nervous system control

smooth muscle, cardiac muscle, and glands

the somatic nervous system is

voluntary

the autonomic nervous system is

involuntary

efferent pathway of the somatic nervous system

one neuron system

efferent pathway of the autonomic nervous system

two neuron system

what does acetylcholine do

excite

what connects a presynaptic and postsynaptic neuron

ganglion

what are the two divisions of the autonomic nervous system

parasympathetic and sympathetic

what does the parasympathetic division do

routine maintenance: rest and digest

what does the sympathetic nervous system do

mobilize, increase metabolism, fight or flight

what spinal levels is the sympathetic nervous system

t1-L2

what spinal levels is the parasympathetic nervous system

brainstem: 3,7,9, 10 and sacral nerves.

where are the ganglia in the sympathetic nervous system

close to spinal cord

where are the ganglia in the parasympathetic nervous system

in/near visceral effector organs

what does the parasympathetic nervous system innervate

internal organs

fibers of presynaptic neurons travel through

ventral root

what do fibers of presynaptic neurons from S2-S4 exit the ventral rami as

the pelvic splanchnic nn.

posynaptic fibers innervate remainder of

GI tract, from distal 1/3 of trans colon and pelvic viscera (urinary bladder, uereters, reproductive organs.

posynaptic neurons, located in the medulla of the adrenal gland, do not develop

axons, but still produce epinephrine and norepinephrine