Development

Who has more bones infants or adults and why

infants because skull bones haven’t fused

If infant skull bones haven’t fused how are they connected

4 fontanelles (softspots) - unossified fibrous membranes that Ease birth and allow brain growth

What are the 4 fontanelles

Anterior, posterior, mastoid, and sphenoidal

What spinal curves happen at birth

thoracic and sacral (primary

What spinal curves happen at childhood and when

secondary

cervical when lifting head

lumbar when walking

Old age - intervertebral discs

Intervertebral discs thin, less

hydrated, and less elastic

Old age - height

height loss

Old age -Costal cartilages

Costal cartilages ossify → breathing is harder

Old age - All bones

lose mass → increase fracture