Components Flashcards
What is a system?
- A group of cells, tissues, and organs working together to perform a given set of functions
What are the components of the muscular system?
Fibers (muscle cells), Muscular tissue, Nervous tissue, Connective tissue, Chemicals, Epithelial tissue, Blood, Blood vessels, Endocrine (hormone) receptors, MUSCLE ORGAN
What are the three categories of connective tissues in muscles?
Epimysium
Perimysium
Endomysium
The three types of muscle fibers
Skeletal
Cardiac
Smooth
Two types of smooth muscle fibers
Multi-unit
Single-unit
Chemical composition of muscle
Ions, atoms, molecules, macromolecule, enzymes
Why are muscles red?
The presences of hemoglobin
Muscle organ types
Smooth, Cardiac, SKELETAL
Parts of the Skeletal Muscle Organ (SMO)
- Tendon of origin
- Belly (muscle fibers)
- Tendon of insertion
A tendon of origin is___
always closest to the midline of the body
The belly of a muscle is composed of ___
Intrafusal- muscle receptors sensitive to stretching
Extrafusal- true contractive fibers of the muscle
The muscle layers from outside in
Epimysium, Perimysium, Endomysium
Fasicles
- a group of bundles of fibers, surrounded by perimysium
- inside of each fiber is 12 or more fibers surrounded by endomysium
Each muscle in the body contains millions of ____
Myofibril
Myofibril
- very thin fibers that make up muscle fibers
- two types of myofilaments
