A&P I Muscles

• Skeletal
• Cardiac
• Smooth

Comprised of very long muscle cells, this muscle tissue is found in the muscles that move the skeleton and able to be controlled voluntarily (voluntary muscle). In addition, this tissue type displays alternating light and dark bands giving the appearance of stripes and striations

Muscle tissue found only in the heart. Similar to skeletal tissue, also has striations. However, unlike skeletal tissue, for the most part cardiac tissue can not be controlled and is thusly considered involuntary. There is some neuronal regulation that controls the beating of the heart but that occurs at a subconscious level.

This type of muscle tissue is found in the walls of hollow visceral organs such as the stomach and the bladder. This tissue type lacks striations and can not be consciously regulated or controlled (involuntary muscle)

The ability to recieve or respond to stimuli

The ability to shorten forcibly when adequately stimulated

The ability to be stretched or extended

The ability of a muscle fiber to recoil and resume its normal resting length after being stretched or contracted

The movement of the skeleton

The ability to make minute changes in positioning to maintain normal position

Muscle tissue and muscle connections surround joints and keep them in position

Muscles generate heat as they contract thereby maintaining normal body temp

• Muscle: A bundle of muscle fascicles
• Fascicle: A bundle of muscle fibers
• Muscle fiber: Is a muscle cell
• Muscle Cell: Contains Myosin and Actin

"within the muscle"- A sheath of primarily reticular fibers that covers the muscle fascicle

"around the muscle"- A sheath of fibrous connective tissue that covers the muscle fascicle

"outside the muscle"- A shaeth of dense irregular connective tissue that covers the whole muscle

• The place of attachment which provides little to no movement (bone moves to origin)

The place of attachment which provides the most movement (movable bone)

The epimysium fuses to the periosteum of a bone or perchondrium of a cartilage

The connective tissue wrappings of the muscle extend beyond the muscle to form either a rope like tendon or a sheet like aponeurosis

Cell membrane of the muscle cell

Cytoplasm of the muscle cell

Red pigment that stores oxygen in the muscle

Rod-like fibers that run parallel down the length of the muscle fiber. Hundreds to thousands of myofibrils can be found in one fiber and account approximately for 80% of the cellular volume.

Globular heads on Myosin .







































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