Oxford amazing science book 6 unit 2 Solved exercise living organisms
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00:001.Living organisms define the following topics are cell, tissue, organ, and organ system.
00:131.Cell, they are the building blocks of all living things.
00:192.Tissue, they are a group of similar cells which are specialized to form a particular
00:25function.
00:27in essence they are used for every work of human being.
00:363.Organ, different types of tissues group together
00:40to form an organ system.
00:41So, its a grupof of tissues which will form an organ.
00:464.Organ system or organ system are made up of many organs which work together.
00:51In a system, many organs work together, many body parts work together, it is called a system.
01:02b. Describe how the transport of material takes place in a plant.
01:10In multicellular plants, materials are circulated in a system of tubes called the vascular system.
01:17The vascular system of plants is composed of specialized tissues called xylem and phloem.
01:23The tissues used in this system are called xylem and phloem.
01:26xylem is made up of long dead cells called vessels.
01:30xylem is made up of dead cells called vessels.
01:34Vessels have thick walls.
01:37They carry water from the roots through the stem to the veins in the leaves.
01:44They carry water from the roots to the veins in the leaves.
01:48Phloem is made up of long thin walled tubes.
01:50Phloem is made up of long thin walled tubes called sieve tubes.
01:58Sieve tubes are a maze of living cells.
02:01Sieve tubes are a maze of living cells.
02:06holes from the leaves to other parts of the plant through these sieve tubes.
02:16See here what is transpiration?
02:28Why is transpiration important for a plant?
02:33Transpiration is loose water vapor into the atmosphere by evaporation.
02:42The water passes through tiny holes called stomata which are found mainly on the lower
02:49side of the leaves.
02:56This process is called transpiration.
03:01It is important because it helps the transportation of water in plants and it also helps plants
03:07to keep cool in the summer.
03:09Respiration is a process by which food is oxidized in the body cells to keep the body
03:39cells to produce energy.
03:52The parts of the respiratory system of a mammal are nose, windpipe, bronchi, bronchioles
04:00and air sacs.
04:13Next is E. Describe the structure of the human heart.
04:17The heart is a muscular organ found in the center of the chest.
04:23It has four chambers.
04:24The upper two chambers are called arteries and the lower two chambers are called ventricles.
04:42Next is F. What is digestion?
04:45Where does digestion of food take place in humans?
04:59The process by which insoluble food is broken down by the action of enzymes into soluble
05:03substances is called digestion.
05:12Food is completely digested in the small intestine.
05:21Next question is G. Name the parts of the nervous system.
05:28Next question is H. What is a reflex action?
05:36A reflex action is an involuntary response to a stimulus such as sneezing.
05:55Next question is I. Identify which of the following are voluntary actions?
06:01Writing, reading, coughing, sneezing, sweating, shivering, and speaking.
06:07Writing, reading, and speaking are voluntary actions.
06:11The rest are involuntary actions.
06:14Next is O. Fill in the blanks.
06:18A. Vessels B. Save tubes C. Transpiration D. Avioli E. Capillary F. Enzymes G. Willi H. Kidneys I. Neurons J. Reflex K. Reflex arc L. Involuntary or reflex action.
06:38Name the parts of the digestive system.
06:44A. Foot pipe B. Stomach C. Small intestine D. Large intestine
06:51Next picture is of excretory system.
06:55Right kidney, left kidney, ureter, bladder, and urethra.
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