Understanding the Human Skeletal System

The video provides an overview of the human skeletal system, highlighting its role as the body's internal framework. Initially, humans have around 270 bones, which fuse to 206 by adulthood. The skeleton performs six key functions: support, movement, protection, blood cell production, mineral storage, and endocrine regulation. Bones provide structure, protect vital organs, and work with muscles for movement. They store calcium and iron, produce blood cells in the marrow, and release hormones for blood sugar regulation. The video also explains bone layers, including cancellous and compact bone, periosteum, and marrow cavity.

How many bones does a human have at birth?

• 300

• 270

• 180

• 206

Which of the following is NOT a function of the skeletal system?

• Digestion

• Support

• Movement

• Protection

What does the ribcage protect?

• Lungs and heart

• Kidneys

• Liver

• Brain

Where are blood cells created in the body?

• Lungs

• Liver

• Bone marrow

• Heart

Which minerals are stored in bones?

• Calcium and iron

• Copper and iodine

• Sodium and potassium

• Magnesium and zinc

What hormone-related function do bones perform?

• Regulate digestion

• Regulate body temperature

• Regulate blood sugar

• Regulate blood pressure

What is the function of compact bone?

• Store fat

• Protect organs

• Provide strength

• Produce hormones

What is the periosteum?

• A type of bone cell

• A blood vessel

• A type of joint

• A protective layer on bones

Where are white blood cells found in bones?

• Red bone marrow

• Yellow bone marrow

• Cancellous bone

• Compact bone