week 1 Flashcards
levels of human structure
atoms, molecules, macromolecules, organelle, cell, tissue, organ, organ systems, organism
endocrine system
function: regulation of body processes through hormone production
organs: adrenal glands, pituitary glans, pancreas
nervous system
function: processing centre for sensory input, using the input to elicit appropriate responses
organs: brain, spinal cord, nerves
respiratory system
function: gas exchange between the internal and external environment
organs: lungs, nose, mouth, windpipe
cardiovascular system
function: circulation of blood which transports gases, nutrients, hormones and waste
organs: heart, veins, arteries, capillaries
digestive system
function: physical and chemical breakdown of food to allow absorption of nutrients
organs: intestines, stomach, rectum, mouth
lymphatic system
function: circulation of lymph which maintains fluid balance and helps fight infection
organs: lymph nodes, spleen, thymus
reproductive system
function: production of reproductive cells that will generate offspring
organs: ovaries, uterus, cervix, vagina
urinary system
function: filtration of blood and excretion of wastes from the body
organs: kidneys, uterus, bladder
integumentary system
function: protection against the external environment and regulation of temperature
organs: skin, nails, hair associated glands
skeletal system
function: support and protection of many internal organs
organs: bones, cartilage, ligaments, tendons
muscular system
function: voluntary and involuntary movement
organs: muscles, soft tissue, tendons
intercellular fluid
fluid inside cells (40% body weight)
extracellular fluid
fluid outside cells (20% body weight)
interstitial fluid
fluid between cells
plasma
fluid component of blood
atoms
smallest units of an element
molecule
2 or more atoms bonded together