Human Anatomy and Physiology

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  1. Wisdom teeth normally grow between the ages of 17 and 30.
  2. Short-sightedness is caused by the elongation of the eyeball.
  3. Blood clotting is made possible by the presence of platelets.
  4. The largest cell in the human body is the female egg cell (ovum).
  5. Salts enter and leave the blood through the process of diffusion.
  6. People with colour-blindness cannot see red and green colours.
  7. The autonomic nervous system controls reflex actions in the body.
  8. A sound intensity of 95 decibels is the maximum limit beyond which a person cannot bear.
  9. The pituitary gland regulates growth, and its over-secretion produces giant-size children.
  10. The spinal cord facilitates reflex actions.
  11. Males have XY chromosomes.
  12. Brain tissue death signifies biological death.
  13. Women’s voices generally have a higher pitch than men’s.
  14. The normal human body temperature is 310 Kelvin.
  15. Thrombosis occurs when blood vessels clot.
  16. Genes determine an individual’s blood group.
  17. Estrogen is secreted by the ovaries.
  18. The thoracic cavity houses the lungs.
  19. Blood groups may be found in their son based on parents’ genetics.
  20. The hormone that contains iodine is Thyroxin.
  21. The respiratory centre is situated in the Medulla.
  22. During sleep, a man’s blood pressure decreases.
  23. Red-green colour blindness in man is known as Protanopia and Deuteranopia.
  24. The number of factors required for blood clotting is 13.
  25. The pH of human blood is 7.35-7.45.
  26. The largest gland in the human body is the Liver.
  27. The universal blood donor is O.
  28. A heartbeat requires approximately 0.8 seconds.
  29. The ultrafiltration unit of the kidney is the Nephron.
  30. In the human body, the leg bones are Fibula and Tibia.
  31. Insulin is secreted by the Pancreas.
  32. The organ in the body which accumulates iodine is the Thyroid gland.
  33. In metabolism, enzymes act as catalysts.
  34. The life of RBCs in human blood is 120 days.
  35. A “Test tube baby” is when fertilization is external and development is internal.
  36. An average adult has 5-6 litters of blood in the body.
  37. Saliva in man is alkaline.
  38. Any foreign particle that stimulates the formation of antibodies is called an antigen.
  39. The main constituent of haemoglobin is Iron.
  40. The maximum temperature a human can endure before getting burned is around 40°C.
  41. Temperature in a human being is controlled by the Hypothalamus gland.
  42. Humans typically have 20 milk teeth.
  43. The hormone Adrenaline influences blood pressure.
  44. The spleen is known as the graveyard of red blood cells.
  45. The retina in the eye acts like a screen in a camera.
  46. The largest part of the human brain is the Cerebrum.
  47. Iron is present in the blood in the form of a complex compound (haemoglobin).
  48. The Tibia is not part of the thoracic cavity.
  49. A roundworm that enters the body through the soles of the feet is the Hookworm.
  50. Only glucose is used for energy by the brain.
  51. The nervous system is affected by the shortage of sodium.
  52. The heart is covered by a membrane called the Pericardium.
  53. A heart attack occurs due to a lack of blood supply to the heart.
  54. Allergy is caused due to an antigen-antibody reaction.
  55. The weight of an average human male brain is about 1350 grams.
  56. Chromium is not found in blood.
  57. The image formed on the retina of the eye is real and inverted.
  58. The first organ to be transplanted was the kidney.
  59. The amount of light entering the eye is regulated by the pupil.
  60. Bile juice is secreted by the liver.
  61. The pituitary gland is also known as the master gland.
  62. Food is mainly digested in the small intestine.
  63. The number of ribs in the human body is 24.
  64. The largest lymphatic organ of the body is the spleen.
  65. Blood pressure is the pressure of blood in the arteries.
  66. The total number of bones in the human skull is 22.
  67. The normal temperature of the human body is 98.6°F.
  68. Oxygen is transported to every cell of the human body by red blood cells.
  69. The element present in the largest amount in the human body is oxygen.
  70. There are 206 bones in the human body.
  71. In Homo sapiens, fertilization occurs in the oviduct.