Anatomy Chapter 1

Origin

The point of attachment of a muscle (to a bone or another muscle), which is not moved by contraction of that muscle., properties attributable to your ancestry

Insertion

Point of attachment of a muscle, that is moved by contraction

Innervation

The arrangement or distribution of nerves to an organ or body part

Functions

Anatiomical function of the particular structure being discussed

Anatomy

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Gross Anatomy

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Miroscopic anatomy-Histology

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Branches of anatomy

1. Systemic anatomy
2. Regional Anatomy
3. Surface Anatomy
4. Developmental Anatomy
5. Embryology
6. Pathologic Anatomy
7. Funtional Anatomy
8. Radiographic Anatomy

Systemic Anatomy

Studies skeletal, muscular, nerous, cardiovascular, digestive, urinary and respitory systems

Regional Anatomy

Discusses the structures of back, upper and lower limbs, thorax, abdomen, pelvis, head and neck region

Surface Anatomy

Shapes and marking on body surface

Developmental Anatomy

Structural changes within the body throughout life

Embryology

study of the development of the body before birth

Pathologic Anatomy

deals with structural changes in the body before birth

Functional Anatomy

Feals with the funtion of body structure

Radiographic anatomy

Study of body using advanced instruments

Major Body Cavaties

1. Dorsal Cavity
2. Ventral Cavity
3. Pelvic Cavity

Dorsal Cavity

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Ventral Cavity

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Thoracic cavity

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Pelvic Cavity

separated by the perineum by the pelvic diapgram, levator ani muscle and the ischiococcygeus muscle

Anatomical Position

When standing tall and palms facing outwards

Axes

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Planes

-Median (median saggital/ midsaggital) plan, left- right
-Sagittal (paramedian/ parasagittal) plan, not directly in half a little to the left or right
-Frontal Plan, front and back
-Transverse plan, up and down

Anterior

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Posterior

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Ventral

Towards the abdomen

Dorsal

towards the back

Superior

upwards with the body erect

Inferior

downwards with the body erect

Cranial

towards the head

Caudal

towards the buttocks

Rostral

towards the mouth

Median

within the median plan

Medial

towards the middle

Lateral

away from the middle

Proximal

towards the limb attachment

Distal

away from the limb attachment

Peripheral

towards the surface of the body

Central

towards the center of the body

Superfical

deep

Ipsilateral

on or relating to the same side (of the body)

Oblique

a diagonally arranged abdominal muscle on either side of the torso

Flexion

bending

Extension

streching

Abduction

away from the body

Adduction

Towards the body

Rotation

pivoting or rotary motion

Circumduction

circular movement

Supination

palm up

Pronation

palm down

X-ray

a type of radiation that can go through many solid substances, allowing hidden objects such as bones and organs in the body to be photographed

Contrast Media

-used in imaging techniques to visualize specific internal structures
1. Barium sulfate ingestion (intestines)
2. Angiography (blood vessels)
3. Myelography (spianl cord and nerve roots)
4. Pyelography (urinary tract)
5. Arthrography (joints)

Computed Tomography (CT)

-3D view of the body
-used to detect body lesions, tumors and other pathologic conditions

Magnetic Resonance Imaging (MRI)

-an imaging technique used to study brain structure and activity
-subjects the body to strong magnetic field (60,000 times stronger than that of the earth)

Positron Emission Tomography (PET)

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Ultrasound

-using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram)
-Duplex scanning, images of vessels or structures (uses combined dopler and b-mode)
-Color coded duplex (CCD), uses color coding to super impose the flow

Skeletal system

-consist of 206 bones
-divided into axial and appendicular skeleton

Axial Skeleton

-made up of 80 bones
Consists of
1. Auditory bones
2. skull
3. hyboid bone in neck region
4. the vertebral column
5. the ribs
6. sternum in thoracic regoin

Appendicular Skeleton

1. bone of the shoulder girdle (scapula and clavicle)
2. the bones of the upper limb, each side
3. the pelvic (hip) bone
4. bones of the lower limb, each side

Bones

complex structure made up of several tissues, including...
1. bone tissue
2. cartilage
3. nerves and others

Long Bones

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Short bones

small and roughly cube shaped

Flat bone

are thin, flattened and usually curved

Irregular bone

are of various shapes and do not fit in other categories

Functions of bones *(FoB)

1. Support
2. Movement
3. Mineral storage
4. Blood-cell formation (hemopoiesis)
5. Triglyceride storage

Support (FoB)

Provide a hard framework to protect the under-lying organs

Movement (FoB)

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Mineral Storage (FoB)

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Blood-cell formation, hemopoiesis (FoB)

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Triglyceride sorage (FoB)

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Structure of bones

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Long Bone

Consist of
-diaphysis (shaft)
-ends called epiphyses
-some parts covered by articular cartilage (hyaline) and epiphyseal plate (cartilage) b/w the diaphysis and epiphysis
-have blood vessels and nerves
-medullary cavity is follow, filled with bone marrow
-outer membrane is periosteum
-inner membrane is the endosteum, cover medullary cavity

Flat Bone

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Bone cells

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Osteoblasts

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Osteoclasts

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Ossification and Development of the bone

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Intramembranous ossification

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Endochondral ossification**

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Ossification of epiphyseal plate

-responsible for lengthening of bones, which continues until age 21

Bone fracture

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