Muscle and neural tissue Flashcards
(34 cards)
What are the characteristics of muscle tissue?
Highly vascularized
Highly cellular
What do muscle tissues do?
Responsible for body movement
What do muscle tissues possess?
Myofilaments that cause movement or contraction in all cell types
What does skeletal muscle look like?
Elongated cells that are multinucleated (nuclei on the periphery) and striations
Where is skeletal muscle found?
On the skeleton
Attached to skin
What does skeletal muscle do?
Voluntary movement
Warm blood
Locomotion
Facial expression
What does smooth muscle look like?
Eliptically shaped cells with central nuclei, no striations but cells are close together to make sheets
Where is smooth muscle found?
Digestive tract
Walls of uterus
Blood vessels
Sphincters
What does smooth muscle do?
Involuntary control
Peristalsis
Vasodilation and vasoconstriction
Involuntary opening and closing of sphincters
What does cardiac muscle look like?
Central nuclei with striations and branching muscle cells with intercalated discs
Where is cardiac muscle found
The heart
What does cardiac muscle do?
Involuntary control
Continuous contractions of the heart from inherent impulse
Propel blood through vessels
What are the two major cell types of nervous tissue
Neurons
Neuroglia
What are neurons?
Cells that generate and conduct nerve impulses
What are neuroglia?
Supporting cells that insulate, support and protect neurons
What tissue types do neurons and neuroglia combine with to form nerves?
Connective and epithelial
What is the input for nerve impulses?
Dendrites
What is the output for nerve impulses?
axon
What is the cell body of neurons called
Cyton
Where is nervous tissue found?
Brain
Spinal cord
Peripheral nerves
What does nervous tissue do?
Coordinates activities between the brain, spinal cord and body organs
What are motor nerves covered by?
Myelin
What are nerves composed of?
Neurons and neuroglia combined with blood vessels and connective tissue
What do nerves do?
protect and nourish nervous tissues
