Jkbose Class 12 Study Material

✅Very important points - Human Reproduction 🌟Uterus also called womb. 🌟 Longest unstripped muscles of the body are found in the walls of uterus. (During pregnancy) 🌟 Clitoris is a homologous to the penis in the male. 🌟 Bartholin Glands : It is homologous to Cowper's gland of male 🌟 A functional mammary gland is characteristic of all female mammals. 🌟 The milk produced during the initial few days of lactation is called colostrum which contains antibodies (IgA) absolutely essential to develop resistance for the new-born babies. ⚡️ Liberation of sperms from Sertoli cells of seminiferous tubules is called spermiation. ⚡️ Liberation of sperms from testes is called semination. ⚡️ Liberation of sperms from body of male is called ejaculation . ⚡️ Mammalian sperms are transfered to vagina of female by the process called insemination. ⚡️ In 1 ml of semen, 20 to 120 millions of sperms are present in human being. ⚡️ Leydig's cells mature at 10 yrs. of age. ⚡️ In humans (and most vertebrates), the first polar body does not undergo meiosis II. ⚡️ The first polar body is, therefore, formed merely to get rid of unwanted chromosomes. ⚡️ 65-74 days are required to complete the cycle of spermatogenesis in human being.

💝💝SUMMARY OF HUMAN PHYSIOLOGY💝💝 ©™✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓ 💖Number of Muscles 639 💖Number of Kidneys 2 💖 Number of Milk Teeth 20 💖 Number of Ribs 24 (12 pair) 💖 Number of Heart Chamber 4 💖Largest artery Aorta 💖Normal blood pressure 120/80mmHg 💖Ph of Blood 7.4 💖 Number of vertebrae in the Spine 33 💖 Number of vertebrae in the Neck 7 💖Number of Bones in Middle Ear 6 💖 Number of Bones in Face 14 💖Number of Bones in Skull 22 💖Number of Bones in Chest 25 💖 Number of Bones in Arms 6 💖Number of Muscles in Human Arm 72 💖Number of Pumps in Heart 2 💖 Largest Organ Skin 💖Largest gland Liver 💖 Biggest cell female Ovum 💖 Smallest cell male Sperm 💖 Smallest Bone Stape 💖 First transplanted Organ Heart 💖 Average length of Small Intestine 7m 💖 Average length of Large Intestine 1.5m 💖Average weight of new Born baby 2.6kg 💖 Pulse rate in One Minute 72 times 💖 Normal body temperature 37 C° (98.4 F°) 💖 Average Blood Volume 4 to 5 liters 💖 Life Span of RBC 120 days 💖 Life Span of WBC 13to 20 days 💖 Pregnancy Period 280 days (40 week) 💖 Number of Bones in Human Foot 33 💖 Number of Bones in Each wrist 8 💖 Number of Bones in Hand 27 💖 Largest Endocrine gland Thyroid 💖Largest Lymphatic Organ Spleen 💖 Largest part of Brain Cerebrum 💖 Largest & Strongest Bone Femur 💖 Smallest Muscle Stapedius (Middle Ear) 💖 Number of Chromosome 46 (23 pair) 💖 Number of Bones in new Born baby 306 💖 Viscosity of Blood 4.5 to 5.5 💖 Universal Donor Blood Group O 💖 Universal Recipient Blood Group AB 💖 Largest WBC Monocyte 💖 Smallest WBC Lymphocyte lb 💖 Increase RBC count called Polycethemia 💖 Blood Bank in the Body is Spleen 💖 Non Nucleated Blood cell is RBC 💖 RBC produced in the Bone Marrow 💖 River of Life is Called Blood 💖 Normal Blood Cholesterol level 250mg/dl 💖 Fluid part of Blood is Plasma 💖 Normal Blood Sugar 100mg

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