Anatomy Flashcards
Scapula
Shoulder blade
Humerus
Upper arm bone
Joints
Connect 2 or more bones
Bones
Structurally support the body
Blood cell manufacturing
Highly vascular -> heal quickly
Organ
Structure composed of different tissues that perform specialized tasks
Tissue
Groups of similar cells that unite to perform a specific function
Cells
10 trillion
200 different types
The parts of the cells are called organelles
Superior
Situated closer to the crown of the head
Inferior
Situated further away from the crown of the head
Lateral
Further from the midline
Medial
Closer to the midline
Supine
On your back
Prone
Body face down
Proximal
Origin or top of limb
Distal
End of the limb or further from the origin of the limb
Posterior
Situated after or behind
Anterior
Situated in front
2 sections of the skeleton
Axial and appendicular
4 main tissues
Connective, nerve, muscle, epithelial
Pectoralis major & minor
“Breast muscle”, right at the front of the chest
Biceps
Front side of the upper arm
Bends the elbow
Pairs with the tricep
Forearm flexors
On front side of lower arm
Helps you go into wrist flexion (when your hand points down)
Forearm extensor
On your posterior forearm
Helps your wrist go into extension (when your wrist is pointing up)
Latisimis Dorsi
Flat muscle on the back that stretches to the sides, behind the arm
Right below your scapula
Moves the arm back in space
Triceps
Three-headed muscle on the back of the arm
Pairs with the bicep
Deltoids
Seashell shaped muscle that forms the rounded counter on the human shoulder
Split up into anterior, posterior, and middle
Levator Scapulae
From top of spine to the medial edge of the shoulder blade
Elevates the scapula
Trapezius
Triangle shaped muscle that goes all the way from C1 to T12
Split into upper, middle, lower
Use them when you shrug or pull your shoulders back
Cartilage
Flexible connective tissue
Absorbs shock
Distributes force
Non-vascular
Wraps the end of bones
Ligaments
Connects bone to bone
Extremely tough collagen fibres
Mostly non-vascular
Most irreparable connective tissue
Duct tape of the body
Tendons
Connects muscle to bone or muscle to muscle
Tough elastin & collagen fibres
Reluctant to stretch
Vascular but heals slowly
3 types of muscle
Cardiac
Smooth
Skeletal
Sprain
Torn ligament
Strain
Torn tendon
Muscles
~ 800 in the body
Work to produce movement by contracting
Cardiac muscle
Found in the heart
Squeezes blood from your heart
Run in many directions
Involuntary
Smooth muscle
Found in organs
Controlled by autonomic nervous system
Skeletal muscles
Under the skin, attached to bones, help with motion of body
Run in a single direction (contracts)
Voluntary
Mobility and stability
Work in agonist/antagonist relationship
Concentric contraction
Muscle shortens continuously while moving through a range of motion
Isometric contraction
Muscles generate force & tension but doesn’t change in length, bones not moving
Eccentric contraction
Muscle contracts while lengthening
Fascia
Biological web that holds us together
Gooey, wet, fibrous
Ability to lengthen
High % of composition is elastin fibres
HIGHLY vascular
Passive static stretching
Body weight & gravity are major forces to lengthen the target muscle
Active static stretching
Agonist muscles strongly contract to lengthen the antagonist
Proprioception
The body’s sense of itself
How we can gauge the location of our body as we move through space
Humerus
Long upper arm bone
Diaphragm
Dome shaped muscle at the bottom of the lungs
Contraction: goes down, breathe in
Relaxation: comes back up, breathe out
Glenoid cavity
Cavity on the scapula where it meets the humerus bone
Clavicle
Collar bone
Acromion
Pointy part of the scapula that meets the clavicle
At the top of the shoulder
GH joint
Glenoid-humeral joint
Where the humerus and glenoid cavity (if the scapula) meet
Ball & socket joint