Honors Muscle and Nervous Tissue

Muscle Tissue

is contractile; can shorten and thicken making making movement possible. Muscle fibers are the cells that make up muscle tissue.

skeletal muscle tissue

forms muscle that attaches to bone, constitutes 40% of human body weight, multiple nuclei per cell, striated or banded due to alternating light and dark contractile proteins

smooth muscle tissue

lacks striations, cells are shorter and tapered at each end, single nucleus, makes up walls of hollow organs such as stomach, intestines, bladder, uterus, blood vessels; involuntary

cardiac muscle tissue

only found in heart, responsible for pumping blood, cells are striated and branched, single nucleus, joined end to end by intercalated disks which contain gap junctions (type of intercellular connection)

nervous tissue

found in brain, spinal cord, peripheral nerves, communicates with each other and other tissues by sending electrical signals called action potentials

neurons

cells of nervous tissue

3 parts of neuron

cell body, axon, dendrites

cell body (soma)

contains the nucleus

axon

conducts action potentials away from cell body

dendrites

receive action potentials and conduct them toward the cell body (usually multiple in neuron)

neuroglia

are the support cells of the nervous system; nourish, protect, and insulate the neurons

which types of muscle tissue are involuntary?

cardiac and smooth muscle tissue

which type of muscle tissue is voluntary?

skeletal muscle tissue

nervous muscle tissue picture

skeletal muscle tissue picture

cardiac muscle tissue picture

smooth muscle tissue picture

Muscle Tissue

Tissue made of cells capable of contracting and provides movement

Skeletal Muscle Tissue

Voluntary muscle pulls on bones and causes body movements.

Cardiac Muscle Tissue

specialized muscle tissue found only in the heart

Smooth Muscle Tissue

In the walls of internal organs; usually involuntarily controlled

Striated

striped

voluntary muscle

controlled by the conscious mind

involuntary muscle

muscle that responds automatically to brain signals but cannot be consciously controlled

nervous tissue

Tissue that senses stimuli and transmits signals

Neurons

Individual cells in the nervous system that receive, integrate, and transmit information.

neuroglial cells

provide physical support, protection, and nutrients for neurons

Dendrites

Branchlike parts of a neuron that are specialized to receive information.

Axons

a part of a neuron that carries impulses away from the cell body