science

Cards (39)

  • digestive system - the organs that break down food into smaller pieces and absorb nutrients and also excrete waste
  • mechanical - grind/pound the food
  • chemical - break down into smaller pieces
  • mouth - beginning of the digestive system
  • teeth - used for chewing BOLUS food mixed with saliva
  • esophagus - delivers food
  • stomach - stores food
    • upper portion - fundus
    • lower porting - antrum
  • tounge - muscle covered with a mucous membrane
  • saliva - can be found in mouth
    • parotid
    • sublingval
    • submandibular glands
  • peristalsis - involuntary contruction and relaxation of longitudinal
  • small intestine
    • duodenum - foot long
    • jejunum - 8 feet
    • ilelium - 12 feet
  • carbohydrates - fuel or energy
  • fiber - vitamins and minerals
    insoluble
  • protein - builds muscle
  • water/beverages - 8-10 servings
  • grains - 6-8 servings
  • vegetables and fruits - 3 servings
  • meat, poultry, fish, beans, eggs - 2-3 servings
  • cell cycle - the series of events that occur in a cell to produce a new cell
  • s/synthesis phase - duplication of DNA
  • chromosomes - filled with DNA
  • DNA
    • deoxyribunucleic acid
    • it has our blue print
  • 2 types of cell
    1. body cells - somatic
    2. sex cells - sperm and egg cell
  • mitosis - occurs in body cell
  • prophase
    • nuclear membrane disingregate
    • centrioles appear & moves to the pole
    • spindle fibers appears
  • metaphase
    • chromosomes line up in the metaphase region
  • anaphase
    • chromosomes are pulled towards the pole
    • spindle fibers shortens
    • chromosomes breaks apart
  • telophase
    • cleavage furrow occurs
    • spindle fiber disappear
    • nuclear membranes reappears
  • meiosis - type of cell division that takes place during the creation of sex cells
  • diploid cell (2N)
  • haploid (N)
  • male - spermatogenesis
  • female - oogenesis
  • creation of sperm cells happens in the testes while egg cell reproduction happens inside the ovary
  • father & mother 23 chromosomes
  • zygote 46 chromosomes
  • spermatogenesis - refers to the production of spermatozoa called sperms which occur inside the testes
  • reproductive cell also known as spermatogonium
  • oogenesis
    • refers to the creation of gametes called ova which happens inside the ovaries
    • reproductive female cells known as oogunium
    • begins in meiosis 1