How Many Body Parts Do Humans Have?

Olivia Bell Photography/Moment/Getty Images

Humans have many body parts including 206 bones and more than 600 muscles. Scientists discovered a new body part, a ligament in the knee now called anterolateral ligament in 2013 at the University of Leuven in Belgium.

The anterolateral ligament knee ligament was found to play a crucial part in anterior cruciate ligament tears. New research is being done on the ligament.

The skeletal system in the body is made up of 206 bones that are arranged in the axial skeletal system and the appendicular skeletal system. The axial skeletal system runs along the midline axis in the body and it is made up of 80 bones that include the skull, hyoid, auditory ossicles, ribs, sternum and vertebral column. The appendicular skeleton is made up of 126 bones that include the upper limbs, lower limbs, pelvic girdle and pectoral (shoulder) girdle.

There are three types of muscle tissue (more than 600 muscles) in the body including skeletal muscle, cardiac muscle and smooth muscle. Skeletal muscle is the kind of muscle that helps to create movement in the body. The skeletal muscles make up 40 percent of a person’s body weight. Cardiac muscle is involuntary muscle in the body and make up the muscles found in the heart cavity. Smooth muscle is also an involuntary muscle, but it makes up the walls of organs, blood vessels and respiratory passageways.