PATHfit Reviewer Flashcards
Study of the structure and function of muscles in the human body.
Muscle Anatomy
Key components of muscles
Muscle Fibers
Fascia
Tendons
Basic building blocks of muscles.
Muscle Fibers
Long cylindrical cells that contains specialized proteins that contract and relax to produce movement
Myofibrils
Refers to the connective tissue that surrounds and separate muscles and other internal structures.
Fascia
Are strong fibrous connective tissue that connect muscles to bones. They transfer the force generated by muscle contraction to produce movement.
Tendons
Types of muscles
Cardiac muscles
Skeletal muscles
Smooth muscles
Only found in the heart. They are responsible for the contraction and popping of the heart. Helping to circulate blood throughout the body.
Cardiac muscles
Attached to the bones and help the body move. They are under voluntary control and are the most common type of muscles in the human body.
Skeletal muscles
Found in the walls of internal organs such as the stomach intestines and blood vessels. They move involuntary and control various internal processes.
Smooth muscles
Functions of muscles
Movement
Stability and posture
Heat production
Protection
Contracting and relaxing and response to nerve signals. This allow for locomotion, maintaining posture, in carrying out voluntary activities.
Movement
Muscles provides the ability and support to the skeletal system, allowing individuals to maintain balance and posture.
Stability and posture
Muscle contractions generate heat, contributing to body temperature.
Heat production
Muscle protect vital organs, such as the heart and lungs, by forming layers of muscles tissues around them.
Protection
The nervous system signals the muscles to contract, and calcium is released to trigger actin myosin interaction
Contraction process
After the nervous signal ceases, the calcium is reabsorbed, in the muscle fibers return to this original state.
Relaxation process
Common muscle injuries
Sprain
Strain
Muscle tears
Can occur due to over exertion improper use of muscles or insufficient warm up
Muscle tears
Prevention tips
Proper warm up
Maintain good posture
Regular stretching
How many muscles in the human body
About 600 muscles
The largest muscles in the body
Gluteus maximus
Strongest muscles in the body
Masseter
A muscle within the ear. The smallest muscle in the body
Stapedius