Please enable JavaScript.
Coggle requires JavaScript to display documents.
Bio ch 17 Movement in humans, (Names are actually not tested) - Coggle…
Bio ch 17 Movement in humans
17.1 Components of our skeleton
20% body weight
Bone
Formed by living cells
Types
Compact bone
Dense and hard
Support
Yellow bone marrow
Spongy bone
Porous
Red bone marrow
Produces blood cells
Store in spleen (Ch8)
Minerals, mainly Ca3(PO4)2
Water + protein
Contains blood vessels
Innervated by nerves
Cartilage
Cartilage
Formed by living cells
Soft and elastic
Less minerals
At end surfaces of bone
Reduce friction
Shape and support
No blood vessels nor nerve
17.2 Organization and functions of the human skeleton
Axial skeleton
Skull
Won't test cranium
Bones will fuse
Vertebral column
No. Pcs won't test
Vertebra
Intervertebral disc
Cartilage
Allows bending
Rib cage
Held by
Sternum
Protect
Lungs
Heart
Appendicular skeleton
Limb bones
Girdles
Pelvic girdle
Hip
Attach
Pectoral girdles
Shoulders
Functions
Support bd. weight
Skeleton works with muscle
Body upright
Movement
Surface 4 muscle to attach
Store mineral
17.3 Joints
Ligament
Tough
Hold in pos.
Types
Hinge joints
1 plane
Elbow
Knee
Ball-and-socket joint
All direction
Prevents dislocation
Elastic
Cartilage
Absorb shock
Reduce friction
Prevent waering
Fibrous capsule
Enclose
Synovial membrane
Secrete synovial fluid
Lubricant, reduce friction
Nourish cartilage cells
17.4 Skeletal muscle
Btb Br tendons
17.5 How the body moves
Tendons
Tough
Inelastic
Opposing muscles
Work in pairs
Bend when contract
Flexor
Straightens when contract
Extensor
(Names are actually not tested)