Presentation on theme: "Organ systems and Homeostasis"— Presentation transcript:
1 Organ systems and Homeostasis Ch.13 section 1Organ systems and Homeostasis
2 Our body Each part of the body has a specific function, or job. The levels of organization in the human body consists of:CellsTissuesOrgansOrgan systems
3 CellsCell theory: a cell is the basic unit of structure and function of a living thingStructure:MembraneCytoplasmNucleusFunctions: cellular respiration, grow, reproduce, excrete waste
4 Tissues Muscles tissue Nervous tissue Connective tissue Can contract (shorten) to move the bodyNervous tissueDirects and controlsCarries electrical messagesConnective tissueProvides support and connects:bone and fatEpithelial tissueSkinlining of digestive system
5 Organs and Organ Systems IntegumentarySkeletalMuscularCirculatoryRespiratoryDigestiveExcretoryImmuneReproductiveNervousEndocrine
6 Integumentary systemSkin, hair, and nails make up your body’s coveringCreate a barrierRegulate your body tempRemove waste – perspireWorks with nervous system to give info about your environm.
7 Skeletal Bones and other connective tissues Supports the body and gives it structureProtects body’s organsProduce bloods cellsConnective tissues attaches bones together
8 Muscular Move the body by pulling on the skeleton Involuntary muscles work by themselvesMuscles and bones: musculoskeletal systemCells – fibers – muscle groups
9 Circulatory Transportation network – carries food and oxygen Collects wasteTransports bloodPowered by pumping of blood: heartAway: arteriesTo: veinsCapillaries: smallest – connect the arteries and veins- reach every cell
10 Respiratory Lungs : takes in oxygen and disposes of carbon dioxide Air moves into the lung then to the capillariesOxygen crosses into the bloodLung expands due to the actions diaphragm.
11 DigestiveDigestion: breakdown of food into small molecules the body can useLiver produces bile and pancreas makes enzymes which help break down the foodWater is removed in large intestine
12 Excretory Body makes excess water and waste Excretory system removes these waste productsKidneys has nephrons which filters bloodUrine flows from kidney to urinary bladder
13 ImmuneProtects the body from disease-causing bacteria and viruses(pathogens)White blood cells attack and destroy viruses or make antibodies (proteins)The immune system remembers the past pathogens and destroys them quicker the next time. (immunity)
14 reproductive Organs that produce sex cells Sex cells carry DNA – informationOrgans can also produce chemicals that regulate the physical development
15 NervousTakes info from envir and body – processes this info and commands the body to respondSome times, you control the brain, in other times, the brain decides for you (involuntary)Brain + spinal cord + nerve cells
16 EndocrineHelps regulate the activities of the organs by releasing hormones (chemicals that change the activity in cells)Collection of glands (tissues that produce and release hormones)Brain signals how much hormones to produce
17 Homeostasis (hoh-mee-oh-stay-sis) Process by which an organism’s internal environment is kept stable in spite of changes in the external environmentWarm blooded… 37 °C – even when it’s cold or hotSweating… or shiveringStress : reaction of your body to potentially threatening, challenging, or disturbing events.- body produces adrenaline to carry more oxygen to body cells.