Skeletal System Worksheet 7th Grade

Are you a 7th grade student learning about the skeletal system? If so, we have just the resource for you! In this blog post, we will introduce you to a helpful worksheet that focuses on the different bones and structures within the human skeletal system. This worksheet is designed to enhance your understanding of the subject and reinforce your learning.

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What is the main function of the skeletal system?

The main function of the skeletal system is to provide structural support for the body, protect internal organs, assist in movement through the attachment of muscles, store minerals such as calcium and phosphorus, and produce red and white blood cells in the bone marrow.

How many bones are there in the human body?

There are 206 bones in the human body.

What are the two main divisions of the skeletal system?

The two main divisions of the skeletal system are the axial skeleton, which includes the skull, vertebral column, and rib cage, and the appendicular skeleton, which includes the limbs and girdles that attach them to the axial skeleton.

What is the purpose of the skull?

The primary purpose of the skull is to encase and protect the brain, which is the most vital organ in the human body. Additionally, the skull provides structure and support for the facial bones and muscles, as well as protection for the sensory organs such as the eyes and ears.

What are some of the functions of the ribcage?

The ribcage serves to protect vital organs such as the heart and lungs, provide structural support for the upper body, and aid in the process of respiration by expanding and contracting to help with breathing. Additionally, the ribcage plays a role in the production of red blood cells in the bone marrow located within the ribs.

What is the function of the spinal column?

The spinal column, also known as the backbone or spine, serves as the main support structure for the body, protecting the spinal cord which is a vital part of the central nervous system. It allows for overall body stability, facilitates movement by providing attachment points for muscles and ligaments, and also helps to distribute the body's weight evenly. Additionally, the spinal column plays a crucial role in enabling us to maintain an upright posture and to bend and twist in various directions.

What are joints and what is their role in the skeletal system?

Joints are connections between bones that allow for movement and flexibility in the skeletal system. They facilitate the articulation and connection of bones, providing the body with the ability to bend, rotate, and move in various ways. Joints also help absorb shock and distribute stress throughout the skeletal system, ultimately enabling us to perform daily activities and functions with ease.

What makes up the appendicular skeleton?

The appendicular skeleton is made up of the bones that form the limbs and the girdles that connect the limbs to the axial skeleton. It includes the bones of the upper limbs (arms), lower limbs (legs), shoulder girdle (scapula and clavicle), and pelvic girdle (ilium, ischium, and pubis). These bones provide support and mobility for the body and play a crucial role in movement and stability.

How do bones grow and develop?

Bones grow and develop through a process called ossification, which involves the deposition of minerals such as calcium and phosphorus onto a framework of collagen fibers. During childhood and adolescence, bones lengthen and thicken through the activity of specialized cells called osteoblasts and osteoclasts. Osteoblasts are responsible for building new bone tissue, while osteoclasts break down and reshape existing bone. Hormones, nutrition, and physical activity all play important roles in bone growth and development.

Name three common skeletal disorders and briefly describe each.

Three common skeletal disorders include osteoporosis, characterized by weakening and increased fragility of bones due to low bone density; scoliosis, an abnormal sideways curvature of the spine that can cause pain and difficulty moving; and arthritis, a group of conditions involving inflammation of joints causing pain, stiffness, and reduced range of motion.