Skeletal System Flashcards
(30 cards)
What is an invertebrate?
An organism with no backbone/vertical column
What is a vertebrate?
An organism that has a backbone
What are the characteristics of a hydrostatic skeleton?
Mostly fluid, soft, and made of contracting and relaxing muscles
i.e. earthworm or jellyfish
What is an exoskeleton?
A skeleton that keeps the structure supported from the outside
i.e a crab or lobster
What is an endoskeleton?
A skeleton that supports a structure from the inside
i.e. a octopus or starfish
What is the common thread between all vertebrates?
They have a endoskeleton
What is the main component of the brain?
The skull or cranium
Where can cartilage be found?
They can be found in joints, the nose, and your ears
What does cartilage do?
It provides support and cushioning for bones and ligaments
What is a joint?
A place where two or more bones meet
How many bones is the average person born with?
270-300
How many bones does the average person have later in adult life?
Around 206
Name 2 Axial Bones
Skull, Ribcage, Spine, Sternum, and Vertical Column
Name 2 Appendicular Bones
Arms, Legs, Pelvis, Hands, Feet, Phalanges
What is the proper name for your jaw?
Mandible
What is the proper name for your collarbone?
Clavicle
What is the proper name for you shoulder blades?
Scalpulas
What is the proper name for your breastplate called?
Sternum
How many pairs of ribs are in the human body?
12 or 24 ribs in total
What is the largest bone in the human body?
Femur (Thigh bone)
What bones are found in the tips of your fingers?
Carpals and Metacarpals
What are osteoblasts?
Cells that build up bone
What kind of cells are osteoclasts?
They are bone cells that break down bones
What is a osteocyte?
Mature bone cells that become retired osteoblasts
