Junior Science, Τόμος 2B.H. Sanborn & Company, 1921 - 571 σελίδες |
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Σελίδα 453
... blood vessels . The ball - and - socket joint at the hip. THE STRUCTURE OF THE BODY 453.
... blood vessels . The ball - and - socket joint at the hip. THE STRUCTURE OF THE BODY 453.
Σελίδα 463
... blood vessels under it causes the color . The surface of the mucous membrane is made up of flat cells . In many places these cells are folded in ; thus glands are formed ( Fig . 269 ) . The Surface FIG . 269. — A simple gland is made by ...
... blood vessels under it causes the color . The surface of the mucous membrane is made up of flat cells . In many places these cells are folded in ; thus glands are formed ( Fig . 269 ) . The Surface FIG . 269. — A simple gland is made by ...
Σελίδα 465
... blood vessels and nerves and is called the pulp . Since our teeth are so strongly made , people are likely to neglect them , and so cause them to be injured or lost . If our teeth are not brushed thoroughly every day , bacteria and ...
... blood vessels and nerves and is called the pulp . Since our teeth are so strongly made , people are likely to neglect them , and so cause them to be injured or lost . If our teeth are not brushed thoroughly every day , bacteria and ...
Σελίδα 476
... blood stream to the cells of the body , and gives up its oxygen to the cells . Thus the cells get their oxygen in ... vessels , and so get between the body's cells . They are the body's policemen , or soldiers , and attack and kill disease ...
... blood stream to the cells of the body , and gives up its oxygen to the cells . Thus the cells get their oxygen in ... vessels , and so get between the body's cells . They are the body's policemen , or soldiers , and attack and kill disease ...
Σελίδα 479
... Veins ? -The tubes carry- ing blood from the heart are called arteries . The large artery going from the right ventricle to the lungs is the lung artery . It carries dark blood which needs to be oxidized . The blood comes back from the ...
... Veins ? -The tubes carry- ing blood from the heart are called arteries . The large artery going from the right ventricle to the lungs is the lung artery . It carries dark blood which needs to be oxidized . The blood comes back from the ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid alcohol ameba animals arteries auricle bacteria become birds blood vessels body bones brain breathing called capillaries carbon dioxide carry cells cerebrum coil cold color compass connective tissue copper cords corn corpuscles covering dermis digestive tract eggs electric current epidermis epiglottis esophagus eyes feet ferments fibers flowers force gastric juice give glands glass grow heart heat insects inside intestines iron joints kind lamp larvæ larynx leaf learned leaves legumes lever light rays liquid lungs machine magnet material membrane milk motion mouth muscles needle nerve object organs oxygen pass piece pistil plants pole produce protected right auricle rubbed sal ammoniac seeds sepals skin small intestine sound stamens steam stem stomach stomata substance sugar sunlight teeth things trees tubes veins ventricle vibrate walls weight wheat wind wire wonderful wood zinc
Δημοφιλή αποσπάσματα
Σελίδα 513 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 404 - THIS is the forest primeval. The murmuring pines and the hemlocks, Bearded with moss, and in garments green, indistinct in the twilight, Stand like Druids of old, with voices sad and prophetic, Stand like harpers hoar, with beards that rest on their bosoms...
Σελίδα 513 - Measures of Length 10 millimeters (mm.) . . . . =1 centimeter cm. 10 centimeters =1 decimeter dm: 10 decimeters =1 meter m. 10 meters =1 dekameter Dm. 10 dekameters =1 hektometer Hm. 10 hektometers =1 kilometer Km.
Σελίδα 513 - ... Area. 100 square millimeters (sq. mm.) = 1 sq. centimeter (sq. cm.). 100 square centimeters = 1 sq. decimeter (sq. dm.). 100 square decimeters = 1 sq. meter (sq. m.). 3. Cubic Measure, or Volume. The unit of volume is the liter, which is 1 cu. dm., or 1,000 cc 1,000 cubic millimeters (cu.
Σελίδα 341 - Levers are divided into three classes: in the first class, the fulcrum ' is between the power and the weight ; in the second class, the fulcrum is...
Σελίδα 245 - ... north pole of one magnet will attract the south pole of another, and the south pole of one will attract the north of another ; but the north...
Σελίδα 333 - In the second class of levers th'e fulcrum is at one end and the power at the other, with the weight between them.
Σελίδα 253 - How may it be shown that a, wire carrying a current is surrounded by a magnetic field ? 33.
Σελίδα 330 - ... (1) The lever (2) The pulley (3) The wheel and axle (4) The inclined plane (5) The wedge (6) The screw...
Σελίδα 320 - The shorter the wave length, or, what is the same thing, the greater the number of vibrations in a second, the higher the pitch of a musical note, and vice versa.