Intro to the Musculoskeletal System - Nursing Study Buddy Video Library

Summary

This video explains the human skeleton's development, structure, and functions. At birth, humans have around 300 bones, which fuse into 206 by adulthood. The bones are classified into five types: long, short, sesamoid, flat, and irregular, and divided into the axial and appendicular skeletons. These bones provide the body’s framework, protect vital organs like the heart, lungs, and brain, and house bone marrow, which produces blood cells and stores essential minerals such as calcium and phosphorus. The video offers a comprehensive overview of the essential roles bones play in the human body.

Takeaways

• 😀 The human skeleton consists of approximately 300 bones at birth, but many fuse together by adulthood, leaving around 206 bones.
• 😀 There are five types of bones in the human body: long bones, short bones, sesamoid bones, flat bones, and irregular bones.
• 😀 Bones are classified into two main sections: the axial skeleton (skull, spine, rib cage) and the appendicular skeleton (limbs and attachments).
• 😀 Bones provide the framework for the body, shaping our form and structure.
• 😀 The rib cage plays a protective role, safeguarding vital organs like the heart and lungs.
• 😀 The skull protects the brain from injury.
• 😀 Bone marrow produces blood cells, including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets.
• 😀 Bones act as storage sites for essential minerals like calcium and phosphorus.
• 😀 The human skeleton serves multiple vital functions, including protecting organs, producing blood cells, and storing minerals.
• 😀 The process of bone fusion begins after birth and continues throughout childhood and adolescence, gradually reducing the number of bones.

Q & A

How many bones are in the human body when we are born?

When we are first born, the human body consists of around 300 bones.

How many bones does the human body have as an adult?

By the time we become adults, the number of bones in the body reduces to about 206, due to the fusion of some bones during growth.

What are the five different types of bones in the human body?

The five types of bones in the human body are long bones, short bones, sesamoid bones, flat bones, and irregular bones.

What are the two main sections of the human skeleton?

The human skeleton is classified into two main sections: the axial skeleton and the appendicular skeleton.

What is the function of the axial skeleton?

The axial skeleton serves as the central framework of the body, protecting vital organs such as the brain, heart, and lungs.

What is the function of the appendicular skeleton?

The appendicular skeleton includes the limbs and girdles and is primarily responsible for facilitating movement and supporting the body's frame.

How do bones protect vital organs?

Bones protect vital organs by forming hard structures like the rib cage, which shields the heart and lungs, and the skull, which protects the brain.

What role does bone marrow play in the body?

Bone marrow produces blood cells, including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets, which are essential for carrying oxygen, fighting infections, and blood clotting.

What minerals do bones store, and why are they important?

Bones store minerals like calcium and phosphorus. These minerals are essential for maintaining bone strength, muscle function, and other vital processes in the body.

Why does the number of bones in the human body decrease with age?

The number of bones decreases with age because some bones fuse together during growth and development, particularly in areas like the skull and spine.