Biology facts

#BIOLOGY_FACTS

#QUICK_REVISION

• Number of bones - 206
• Number of muscles - 639
• Number of kidneys - 2
• Number of milk teeth - 20
• Number of ribs - 24 (12 pairs)
• Number of chambers in the heart - 4
• Largest artery - Aorta
• Normal Blood pressure - 120 - 80
• pH of blood - 7.4
• Number of vertebrae in the spine - 33
• Number of vertebrae in the Neck - 7
• No 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 bones in each human ear - 3 {malleus,incus,stapes}
• Number of muscles in the human arm - 72
• Number of pumps in heart - 2 -S A Node, A V Node
• Largest organ - Skin
• Largest gland - Liver
• Smallest cell - Blood cell
• Biggest cell - Egg cell (ovum)
• Smallest bone - Stapes
• First transplanted organ - Heart
• Average length of small intestine - 7 m
• Average length of large intestine - 1.5 m
• Average weight of new born baby - 2.6 kg.
• Pulse rate in one minute - 72 times
• Body Temperature - 36.9o C (98.4o F)
• Average blood volume - 4 - 5 liters
• Average life of RBC - 120 days
• Pregnancy period - 280 days
• 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 cell - Nerve cell
• Largest part of brain - Cerebrum
• Largest & strongest bone - Femur
• Smallest muscle - Stapedius (Middle ear )
• Number of chromosomes in human cell - 46 (23 pairs)
• Number of bones in New born body - 300
• Largest muscle - Buttock (Gluteus Maximus)