Anatomy: Muscular System

What are the three distinct types of muscle tissue found in the human body?

Skeletal, cardiac, and smooth muscle tissue.

Which muscle is commonly referred to as the 'six-pack' and is responsible for flexing the vertebral column?

Rectus abdominis.

Where is the gastrocnemius muscle located and what is its general name?

It is located in the posterior lower leg and is commonly called the calf muscle.

What is the primary function of the diaphragm in the respiratory system?

It is the primary muscle of inhalation, contracting to enlarge the thoracic cavity.

Which large, triangular muscle covers the shoulder joint and acts as the primary abductor of the arm?

Deltoid.

Which property of muscle tissue allows it to return to its original length and shape after being stretched?

Elasticity.

Where is smooth muscle typically found in the body?

In the walls of hollow internal organs, such as the stomach, intestines, and blood vessels.

What is the large, diamond-shaped muscle of the upper back that stabilizes and moves the scapula?

Trapezius.

What are the two primary actions of the biceps brachii at the elbow and forearm?

Flexion of the elbow and supination of the forearm.

Contrast the primary actions of the quadriceps group and the hamstring group at the knee joint.

The quadriceps extend the knee, while the hamstrings flex the knee.