Skeletal system

Skeletal system

Bones

• You were born with 300 bones

• Adults have 206

• Some bones fuse together as you grow

• Bones work with muscles for movement

• Bones help maintain homeostasis by storing minerals and making blood cells.

Multiple Choice

Which statement is not a function of the skeletal system?

• Protects organs

• stores minerals

• circulates blood in the body

• helps with movement

Bone Structure

• made of connective tissue and minerals

• compact bone - rigid and dense outside

• spongy bone - tiny canals inside that provide strength and support

• soft tissue called marrow fills in spaces of spongy bone

• Red marrow makes blood cells

• yellow marrow stores fats

Multiple Choice

What are the 2 types of bone tissue?

• spongy bone and compact bone
• marrow and blood vessels
• axial and appendicular

Multiple Choice

Which bone structure makes new blood cells?

• Compact

• Spongy

• Red Marrow

• Yellow Marrow

Bone Growth

• Most bones start out as cartilage

• Most bones have growth plates for future growth

• Some cartilage is never replaced

Multiple Choice

During this stage, bone growth occurs at growth plates.

• Infancy

• Childhood

• Adulthood

Joints

• where two or more bones meet

• allow for movement when muscles contract

• fixed joints allow little movement

• ball and socket example: shoulder and hip

• hinge example: elbows knees fingers

• gliding example: wrist and ankle

• saddle example: thumb and pivot example: neck

Joints continued

• held together by connective tissue called ligaments

• cartilage covers the ends of bones were they meet other bones

Multiple Choice

What is cartilage?

• joints that connect bone to tissue

• Connective tissue that acts as balance for the body

• Connective tissue near joints that act as a shock absorber

• a piece of tissue that is attached to the scapula

Multiple Choice

All of the following are examples of hinge joints except...

• knee
• shoulder
• elbow

Multiple Choice

All of the following are examples of ball-and-socket joints except...

• hip
• shoulder
• knee

Multiple Choice

What connects bones together?

• ligaments

• brains

• trachea

• heart

Skeletal System Injuries and Diseases

• Fractures

• dislocated joint

• sprain

• osteoporosis

• arthritis

Multiple Choice

Which one is not an injury or disease of the skeletal system?

• stroke

• sprain

• osteoporosis

• fracture

Multiple Choice

During this stage of development, the bones may become less dense and break easily.

• Infancy
• Childhood
• Adolescence
• Adulthood