Flexion refers to a movement that decreases the angle between two body parts. Extension refers to a movement that increases the angle between two body parts. Extension at the elbow is increasing the angle between the ulna and the humerus. Extension of the knee straightens the lower limb.

: to not plan or want to (do something) He said he loved her, but he actually had no intention of marrying her.

So, what is the difference between abduction and adduction? “Abduction refers to your body part moving away from the midline of your body, adduction is coming towards the midline of your body,” explains Kewley.

The rectus femoris muscle crosses both the hip and the knee joint. Muscle contracture can be demonstrated by noting movement at one joint as the muscle is stretched at the other.

The main muscles associated with hip flexor strains are the psoas, iliacus and rectus femoris. The psoas and iliacus are often incorrectly referred to as one muscle, the “iliopsoas”. Both these muscles act as one-joint hip flexors, meaing they only cross the hip joint.

All three hamstring muscles (except the short head of the biceps femoris) cross two joints – the hip and the knee. The short head of the biceps femoris is a single joint muscle that originates on the upper part of the femur and inserts on the fibula.

All muscles cross at least one joint (+ a few exceptions). 2. The bulk of muscle lies proximal to the joint crossed.

2. Muscles Act on Synovial Joints to Move the Body

• Flexion: decreasing the angle between two bones (bending).
• Extension: increasing the angle between two bones (straightening a bend).
• Abduction: moving away from the body’s midline.
• Adduction: moving toward the body’s midline.

Different types of muscle

• Skeletal muscle – the specialised tissue that is attached to bones and allows movement.
• Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries.
• Cardiac muscle – the muscle specific to the heart.

involuntary muscles

The heart wall is comprised of three layers, the epicardium (outer), myocardium (middle), and endocardium (inner).

Muscle is one of the four primary tissue types of the body, and the body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscle (Figure 7.2).

Your heart is actually a muscular organ. An organ is a group of tissues that work together to perform a specific function. In the case of your heart, this function is pumping blood throughout your body. Additionally, the heart is largely made up of a type of muscle tissue called cardiac muscle.

Skeletal muscles contain connective tissue, blood vessels, and nerves. There are three layers of connective tissue: epimysium, perimysium, and endomysium. Skeletal muscle fibers are organized into groups called fascicles.

Skeletal muscle

Muscles are how we move and live. All movement in the body is controlled by muscles. Some muscles work without us thinking, like our heart beating, while other muscles are controlled by our thoughts and allow us to do stuff and move around. All of our muscles together make up the body’s muscular system.