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Aimee Vega

Anatomy week 1-5

TermDefinition
What are the levels of structural organization in the human body from simplest to most complex? Chemical, Cellular, Tissue, Organ, Organ system, Organism
Anatomical position and planes used to discribe body parts? . Anatomical position- body upright, facing forward, arms at sides, palms forward. Planes- sagittal (left/right) Frontal-(anterior/posterior) Transverse(superior/inferior)
Homeostasis The bodies ability to amintain stable internal conditions. Controlled mainly by the nervous and endocrine system
Functions of the integumentary system Protection, temperature regulation, sensation, vitamin D synthesis, and excertion of waste through sweat
What are the three layers of the skin Epidermis: stratified squamous epithelium (keratin,melanin) Dermis: connective tissue (blood vessels, nerves, glands, hair follicles) Hypodermis: adipose tissue for insulation and cushioning
What are the major types of skeletal tissues? Compact bone (dense and strong) Spongy bone (pourous, contains red marrow)
Axial and appendicular Skeleton Axial: skull, vertebral column, ribs, sternum-protects brain, spinal cord and organs Appendicular: limbs and girdles- suports movemrnt and muscle attachment.
Functional unit of compact bone The osteon (Haversian system)- contains a central canal,lamellae, osteocytes in lacunae and canalicili for nutrient transport.
Steps of skeletal muscle contraction nerve impulses release acetylochine at neuromuscular junction calcium ions rel. sarcoplasmin reticulum calcium binds troponin, moving tropomyosis to expose actin sites myosin head attach-powerstroke-ATP reset, Contraction cont. with ATP and CAl present
What are general functions of the muscular system Movement, posture maintenance, joint stabilization, and heat production (thermogenesis)
Created by: Eddiesgirl01
 

 



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