The Intricate Structure and Functions of Human Bones

The video explains the functions of bones, including structure, support, protection, blood cell production, and mineral storage. It details the two types of bone tissue: cortical and cancellous. Cortical bone is dense and forms the outer layer, while cancellous bone is porous and contains bone marrow. The video describes the structure of osteons in cortical bone and the process of bone remodeling involving osteoblasts and osteoclasts. It also covers the role of bone marrow in producing blood cells, highlighting the differences between red and yellow marrow and their functions.

What are the primary functions of bones in the human body?

• Only protect organs

• Store minerals and produce blood cells

• Only allow for mobility

• Only provide structure and support

What is the primary anatomical unit of cortical bone?

• Trabeculae

• Lacunae

• Osteon

• Canaliculi

Which canals run perpendicular to osteons in cortical bone?

• Haversian canals

• Volkmann canals

• Canaliculi

• Lacunae

What is the process called where mature bone tissue is removed and new bone tissue is added?

• Bone growth

• Ossification

• Calcification

• Bone remodeling

Which cells are responsible for breaking down bone tissue?

• Osteoclasts

• Chondrocytes

• Osteoblasts

• Osteocytes

What is the primary function of cancellous bone?

• Provide structural support

• Protect organs

• Facilitate hematopoiesis

• Store fat

What is the primary anatomical unit of cancellous bone?

• Trabeculae

• Lacunae

• Canaliculi

• Osteon

Where is red bone marrow primarily found in adults?

• In the hollow cavity of long bones

• In the bone marrow of the femur, ribs, and pelvic bones

• In the skull

• In the vertebrae

What is the main function of yellow bone marrow?

• Produce blood cells

• Store minerals

• Store fat

• Provide structural support

In what situation can yellow bone marrow transform into red bone marrow?

• During bone growth

• In response to exercise

• In life-threatening situations

• During sleep