Lecture 4.5: Tissues
Mucous MembranesLine cavities that communicate
with the exteriorSurface moist all of the time
Figure 4.12a
Serous MembranesSealed, internal divisions of ventral
cavityPleura—covers lungsPeritoneum—lines abdominal cavity
(covers organs like spleen and stomach)Pericardium—covers heartParietal portion—lines inner surface of
cavityVisceral portion—covers organs within
cavityMinimize friction
Figure 4.12b
Cutaneous MembraneAKA: SkinStratified squamous epithelium
and dense connective tissueThick, waterproof, dry
Figure 4.12c
Synovial MembraneArticulations (Joints)—where
bones meetLine bones at freely moving jointsProduce synovial fluidLubricates jointPermits smooth movement
Figure 4.12d
Muscle Tissue TypesSkeletal MuscleMade up of skeletal fibersStriations—striped patternMultinucleatedContract only when stimulatedVoluntary
Figure 4.13a
Muscle Tissue cont…Cardiac MuscleOnly in heartStriatedOne nucleusIntercalated discs—connect cellsPacemaker cells—set up regular
rate of contractionInvoluntary
Figure 4.13b
Muscle Tissue cont…Smooth MuscleIn hollow organs1 nucleusNo striationsInvoluntary
Figure 4.13c
Neural TissueMostly in brain and spinal cordNeurons—nerve cellsNeuroglia—supporting cells
Figure 4.14a