Chapter 2 - Human Anatomy Flashcards
Structure determines ________
Function (the structures of the human body are well designed for efficient movement)
Human anatomy
The study of the structures of the human body and how those structures relate to each other
Anatomical position
- standing erect, facing forward, legs straight, palms forward, arms hanging at the sides, toes feet heels parallel to eachother
- the starting point for describing the human body
- universally accepted
- used in all anatomical descriptions and reference for movements
Lateral
Away from the midline of the body
Medial
Towards the midline of the body
Distal
Further from some specified point
Proximal
Closer to some specified point
Anterior
Front of or front of your body
Posterior
Behind or back of body
Superior
Above
Inferior
Below
Supine
Lying on your back like Doing a sit up
Prone
Lying face down like doing a push up
Median or sagittal plane
Vertical plane that bisects the body into right and left halves
Frontal plan3
A vertical plane that bisects the body into front and back
Transverse or horizontal plane
A horizontal plane that bisects the body into top and bottom
Flexion
Reduces the angle between two bones at a joint
Extension
Increases the angle between 2 bones at a joint
Abduction
Moving a segment away from the midline of the body
Adduction
Moving a segment towards the midline of the body
Circumduction
A come of movement that does not include any rotation
Rotation
Turning of a bone on its longitudinal axis
Medial rotation
Rotation towards the midline
Lateral rotation
Rotation away from the midline
Pronation
When the palm is moved to face posteriorly
Supination
When the palm is moved to face anterior my
Dorsiexion
Bringing the top of the foot toward the lower leg or shin
Plantar flexion
“Planting” the foot
Inversion
When the sole is turned inward
Eversion
When the sole is turned outward or away from the median plane of the body
There are approx ____ bones that make up the human skeleton
206
Function of skeletal system is:
To provide the supporting framework:
To protect the vital organs
_______ is the outermost part of the bone composition and is the densest
Cortical bone
What makes bones denser and more mineralized?
Regular physical activity
Axial skeleton
Made up of the skull, sternum, ribs, and vertebral column
Skull is divided into two parts. What are they?
Calvaria (cranial vault) and facial bones
Calvaria (cranial vault)
The bones which make up the skull (frontal bone, parietal bone, occipital bone and temporal bone)
Facial bones
Smaller distinctive bones that make up the facial features (lacrimal bone, nasal bone, zygomatic bone, maxilla bone and mandible bone)
Which part of the jaw is fixed and which part is hinged
The mandible is hinged so it is movable however the maxilla is fixed so it is immovable
Vertebral column
- 7 cervical vertebrae (of the neck)
- 13 thoracic vertebrae (of the chest)
- 5 lumbar vertebrae (for the lower back)
- sacrum (mid-line region of buttocks)
- coccyx (4 or 5 fused vertebrae of the tail bone)
Ribs
Protect the heart, lungs liver spleen and kidneys
There are ___ pairs of ribs
12
Ribs are made up of what 2 things?
Bone and cartilage which strengthen the chest cage and permit it to expand
The ribs are classified into 3 groups based on anterior attachment. What are these 3 groups?
True ribs
False ribs
Floating ribs
True ribs
Ribs 1-7
Attach to both the vertebrae and the sternum
False ribs
Ribs 8-10
Attach only to the sternum indirectly through the 7th rib
Floating ribs
Rib 11 and 12
Only attach to the vertebral column
Appendicular skeleton
Made up of the pectoral girdle (chest), pelvic girdle (hip), the upper limbs and the lower limbs
Pectoral girdle
Made up of the scapula (shoulder blade) and the clavicle (collar bone)
- gives the upper limb lots of mobility
_________ joint is the only point of attachment between the axial skeleton at the pectoral girdle
Sternoclavicular joint
Pelvic girdle
Formed by a pair of os coxae (shoulder bones)
Supports the bladder and the abdominal contents
The pelvic girdle attaches posteriorly to the _______
Sacrum
The pelvic girdle attaches anterior lay to ________
Pectoral girdle
The pelvic girdle attaches laterally to the head of the ____ bone through a cup-shaped acetabulum
Thigh bone
Upper limb
Consists of humerus (long arm bone that extends from the shoulder to the elbow), and the radius and ulna (forearm bones which go from the elbow to the wrist)
Radius
Located on thumb side of hand
Ulna
Baby finger side of hand
When you pronate (face palm inferiorly) the forearm, the _____ actually crosses over the _____.
Radius crosses over the Ulna
Wrist
Has 2 rows that each have 4 bones in them (total of 8) called carpals
The long bones of the hand are called ______.
Metacarpals
How many phalanges/phalanx are there on each finger?
Each finger has 3 except the thumb only has 2
Lower limb consists of?
Femur, patella, tibia, fibula, medial malleolus, lateral malleolus, tarsals, calcaneus, talus, metatarsals and phalanges
The thigh bone that extends from the hip to the knee is the _____
Femur
Another name for the knee cap?
Patella
What kind of bone is the knee cap/patella?
Sesamoid bone in the tendon of the quadriceps muscle (thigh)
What are the 2 leg bones that extend from the knee to the ankle? Which is medial, which is lateral?
Tibia is medial, fibula is lateral
What is on the distal end of the tibia?
Medial malleolus