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Ch 12: Gross Anatomy of Muscular System

About This Chapter

Watch video lessons, and learn about the different aspects of the gross anatomy of the muscular system. These lessons are just a portion of our course materials.

Gross Anatomy of Muscular System - Chapter Summary and Learning Objectives

Your body is comprised of various muscles, and each serves a specific function. Understanding how each muscle functions can help you to understand more about the overall process of body movement. Discover how muscles in various parts of the body support that body part and allow it to move properly. In these lessons, you'll discover more about muscles in the head, neck, vertebral column, arms and legs. Some of the things you will study include:

  • The three classes of muscle levers
  • How types of muscular contraction is determined
  • Muscles that support the head
  • How muscles help the arm move
  • Anatomy of the leg muscles.

VideoObjective
How Muscle Levers Affect Muscle Efficiency Discover muscle levers and their role in the function of muscles.
Muscle Origin and Insertion: Definition and Actions Find out how muscle origin and insertion determine the type of muscular contraction.
Muscles of the Head and Neck: Anatomy, Motion & Support Examine how muscles support and aid in movement of the head and neck.
Muscles of the Vertebral Column: Support & Movement Explore the way the trunk is supported and how it moves.
Abdominal Muscles: Anatomy & Functions Study the movement and anatomy of abdominal muscles.
Shoulder Muscles: Anatomy, Support & Movement Analyze the function of shoulder muscles.
Arm Muscles: Anatomy, Support & Movement Learn more about the muscles that cause movement of the arm.
Forearm Muscles: Anatomy, Support & Movement Discover the muscles of the forearm.
Hip Muscles: Anatomy, Support & Movement Find out how the hip muscles function.
Thigh Muscles: Anatomy, Support & Movement Explore the muscles that support and move the thigh.
Leg Muscles: Anatomy, Support & Movement Examine how muscles in the legs function.

12 Lessons in Chapter 12: Gross Anatomy of Muscular System
How Muscle Levers Affect Muscle Efficiency

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.

How Muscular Contraction Causes Articulation: Definition & Types

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.

Muscle Origin and Insertion: Definition and Actions

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.

Muscles of the Head and Neck: Anatomy, Motion & Support

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.

Muscles of the Vertebral Column: Support & Movement

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.

Axial Muscles: Trunk Muscles Anatomy & Support

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.

Shoulder Muscles: Anatomy, Support & Movement

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.

Arm Muscles: Anatomy, Support & Movement

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.

Forearm Muscles: Anatomy, Support & Movement

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.

Hip Muscles: Anatomy, Support & Movement

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.

Thigh Muscles: Anatomy, Support & Movement

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.

Leg Muscles: Anatomy, Support & Movement

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.

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