About This Chapter
Gross Anatomy & Functions of the Muscular System - Chapter Summary
These lessons were assembled with the purpose of helping individuals like yourself review what they know about the gross anatomy and functions of the muscular system. Follow along with them to review the different types of muscles, muscle groups and how they work. Each lesson is taught by one of our professional instructors who will help you improve your understanding of:
- The relationship between muscular contractions and articulation
- Effects of muscle origin and insertion on articulation
- Anatomy, movement, and support of the muscles of the head, neck and vertebral column
- Support and anatomy of the axial muscles and shoulder muscles
- Movement and anatomy of the arm and forearm muscles
- Support and movement of the hip, thigh and leg muscles
- Functions and locations of the three types of muscles
- Major functions of the skeletal muscles, cardiac muscles and smooth muscles
These lesson videos also come with a series of lesson transcripts and lesson quizzes. The lesson transcripts, or written overviews of the lessons, have been included to help you reinforce your retention of the material presented in the videos and aid in your study of the vocabulary of the chapter.
The lesson quizzes provide you with the opportunity to test your understanding of the lessons and discover which topics you don't understand. To improve your understanding of weak areas, the quiz results present you with video tags that can used to return to the parts of the lessons that explain these topics.
1. How Muscle Levers Affect Muscle Efficiency
Muscular contraction creates force to move the weight of our body and body parts. This lesson describes the three lever systems utilized by our body to create movement. The efficiency of each lever type in terms of strength, speed and distance are identified along with examples.
2. How Muscular Contraction Causes Articulation: Definition & Types
Skeletal muscle contraction causes all types of movement. Movement at our joints is referred to as articulation. All articulation is described in reference to the anatomical position, and most articulations are identified in opposite pairs. This lesson identifies and describes the major articulations of the human body.
3. Muscle Origin and Insertion: Definition and Actions
Did you know that groups of muscles are needed for various body movements? Skeletal muscles attached to bone are responsible for movement and support. Muscles work in groups to produce a particular movement. This lesson describes how muscle origins and insertions dictate the type of movement that occurs when a muscle contracts.
4. Muscles of the Head and Neck: Anatomy, Motion & Support
The muscles of the head and neck are responsible for a variety of movements, including facial expression, mastication, and eye movement, in addition to moving the head. This lesson identifies and describes the major muscles of the head and neck along with their general action.
5. Muscles of the Vertebral Column: Support & Movement
Did you know that lower back pain can be caused by injury to muscles attached to the vertebral column? This lesson identifies and describes the major erector spinae muscles responsible for erect posture and movement.
6. Axial Muscles: Trunk Muscles Anatomy & Support
The trunk or torso of the human body contains several important muscle groups that aid in breathing and provide support to other parts of our anatomy. This lesson explores the location and function of the major axial muscles.
7. Shoulder Muscles: Anatomy, Support & Movement
The shoulder contains muscles that not only stabilize the shoulder but also move the arm. This lesson identifies and describes the muscles responsible for shoulder positioning, adduction, abduction, flexion, extension and shoulder rotation.
8. Arm Muscles: Anatomy, Support & Movement
Did you know that push-ups require contraction of the triceps brachii? The muscles that move the forearm can be categorized based on general action. This lesson identifies the major forearm flexors, extensors, supinators and pronators.
9. Forearm Muscles: Anatomy, Support & Movement
Did you know the muscles that move the hand, fingers and thumb are located in the forearm? This lesson identifies and describes the major muscles that flex and extend the wrist, fingers and thumb.
10. Hip Muscles: Anatomy, Support & Movement
Did you know the gluteal muscles of the buttocks are among the strongest in the body? These muscles, along with other muscles, originate from the pelvic girdle and insert on the femur, producing movement of the thigh.
11. Thigh Muscles: Anatomy, Support & Movement
Did you know the thigh is the part of the lower appendage proximal to the knee? The muscles of the thigh move the leg at the knee. This lesson will identify the major muscles involved in flexion and extension of the leg at the knee, including the hamstrings and quadriceps femoris groups.
12. Leg Muscles: Anatomy, Support & Movement
The larger muscles that move the foot and toes are located in the leg, while smaller muscles are located in the foot. This lesson describes the major muscles responsible for the various movements of the foot at the ankle and the toes.
13. Three Muscle Types: Function & Location
Your muscles are all about movement. Some of these muscles you control, like your skeletal muscles, while others are not under your control, like the cardiac and smooth muscles. Learn where these three types of muscles are found and what they do.
14. Major Skeletal Muscle Functions
Did you know that skeletal muscle does more than just move our body parts? This lesson describes how skeletal muscles are used for movement, posture, swallowing, defecation, urination and homeostasis.
15. Major Functions of Cardiac & Smooth Muscles
Did you know that you can't control all of your muscles? Some muscles, such as cardiac and smooth muscles work, without you thinking about them. Learn about these involuntary muscles and how they help with things like pumping blood and digesting food.
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