Possible Science One Words- Chapter-5

SCIENCE ONE WORDS

Chapter – 5 Representative Study of Mammals:

1.      Mammals are a divergent group of animals, occupying different biomes of the environment, successfully adapting to their habitats.

2.    Hair is also a sensory structure, as the whiskers of cats and dogs are sensitive to touch.

3.    Mammals’ long, sharp, stiff hairs called quills protect them from predators.

4.    Habitat is the place where an organism lives.

5.     Mammals are warm-blooded or homeotherms, maintain a constant body temperature, irrespective of the temperature in the surroundings.

6.    In mammalian, RBC is fully packed with the respiratory red blood pigment called hemoglobin, to carry maximum amount of oxygen.

7.     The heart is covered by a protective double layered membrane called pericardium filled with pericardial fluid.

8.    The heart is made up of a special type of muscle, called cardiac muscle.

9.    The right half of the heart receives and pumps out deoxygenated blood and the left half of the heart receives and pumps out oxygenated blood.

10.  The auricles are the thin-walled upper chambers of the heart.

11.  The auricles are divided into a right auricle and a left auricle, by a partition called inter-auricular septum.

12. The ventricles are the thick-walled lower chambers of the heart.

13. There are three distinct types of blood vessels namely, arteries, veins and capillaries.

14. Arteries carry the blood from the heart to different parts of the body.

15.  The aorta branches into arteries and arteries branch into arterioles.

16. Arterioles branch into fine tubes called meta arterioles and the meta arterioles end up in the tiny blood vessels called capillaries.

17.  Capillaries are tiny blood vessels that form a network, called capillary network around the tissues.

18. The human heart works by contraction and relaxation of the cardiac muscles.

19. The contraction phase is called systole and relaxation phase is called diastole.

20.  The veins carry the blood from different parts of the body to the heart.

21. The human heart beats 72 times a minute when the body is at rest.

22.   The closure of the valves of the heart produces two different cardiac sounds- “lubb” and “dubb”.

23.  Heartbeat is an inherent capacity of the heart.

24.  The heartbeat begins and is conducted by the specialized muscle bundle in the heart.

25.  Man is an intellectual social animal.