. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . Fig. 3.—A compouud microscope suchas is used to study the cells of thebody and disease germs. 16 PLAN OF THE BODY A One celled Animal. —By means of the microscope theslipper animalcule may be seen to have the general shape. Fig. 4. — Drawings of sections of cells. Magnified. &, bone cell; c,epithelium cell from the intestine; e, flat epithelium cell from themouth ; /, fat cell; n, nerve cell from the brain ; rn, muscle cell. of a slipper, though its outline changes
. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . Fig. 3.—A compouud microscope suchas is used to study the cells of thebody and disease germs. 16 PLAN OF THE BODY A One celled Animal. —By means of the microscope theslipper animalcule may be seen to have the general shape. Fig. 4. — Drawings of sections of cells. Magnified. &, bone cell; c,epithelium cell from the intestine; e, flat epithelium cell from themouth ; /, fat cell; n, nerve cell from the brain ; rn, muscle cell. of a slipper, though its outline changes much when itrubs against an object. The delicate cell wall is elastic and transparent, and iscovered with fine hair-like processes calledcilia^ by moving whichit swims rapidly. Afaintly darker oval spotnear the center is thenucleus. It takes infood consisting chieflyof tiny plants calledbacteria^ through a. groove on one side. The Fig. 5. —Slipper animalcule begmmng to ^ divide and thus to form two cells, each of food, when within the which will swim away as a distinct animal, protoplasm, is dissolved, The nucleus has already divided. Photo- ^ ^ graphed through the microscope. and SOme of it beCOmeS
Size: 2384px × 1048px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, booksubjectp
