CBSE Class Notes Online – Classnotes123
CBSE Class Notes, Worksheets, Question Answers, Diagrams , Definitions , Diffrence between , Maths Concepts, Science Facts Online – Classnotes123
How does the Embryo get Nourishment Inside the Mother’s Body? What is Placenta ? Explain Structure and Function of Placenta? How will an Organism be Benifitted , If it Reproduces …
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Define Placenta Placenta is the temporary organ for a baby’s life-support system.It contains tiny blood vessels from the fetus that pass close to the mother’s blood vessels, without the blood …
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The Endocrine System The endocrine system works together with the nervous system to control and coordinate the body. Endocrine glands secrete chemicals called hormones into the bloodstream. Blood then transports …
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The placenta is a disc-like tissue that develops between the uterine wall and embryo allowing the diffusion of nourishment from the mother’s blood to the growing fetus and waste disposal from the fetus to the mother. It receives oxygen, glucose, amino acids, lipids, vitamins, mineral ions and antibodies from the mother’s blood and removes carbon dioxide and urea from the fetal blood. The umbilical cord containing blood vessels connects the placenta to the fetus. It aloows the exchange of nutrients and waste products.
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6 Important Advantages of Sexual Reproduction over Asexual Reproduction are explained
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Seminal vesicles A pair of lobulated glands located between the posterior surface of the urinary bladder and the rectum. A duct from each seminal vesicle joins the corresponding sperm duct …
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Double fertilization explained in details with the complete step by step process of double fertilization with neatly labeled diagram ,discovery and 6 important significance
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Fertilization Pollination is followed by Fertilization in Plants. Fertilization is the process of fusion of male germ cells with the female gametes. It gives rise to a zygote. As soon …
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Agents of cross-pollination The two commonest agents of cross-pollination are insects and wind. But, some flowers are also pollinated by certain animals and birds, like squirrels, bats, etc., or even …
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Define Pollination- The transfer of pollen grains from the anther of the stamen to the stigma of a flower is termed as Pollination.The pollen grains can be transferred by various …
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