Human Biology Basics Everyone Should Know

Biology is the study of life and is used in all fields. It also deals with different interesting aspects on earth. In this subject, we learn about life, diseases, different scientists with their inventions, organisms and many other aspects related to life on planet earth. Biology conveys us about different species including extinct and present along with their habitat and behavior. It is the natural science, which is concerned with the study of living organisms around us and is valuable to know biology basics which keep our body working.

Human biology is amazingly complex and mind-boggling as many complicated processes are carried out by our bodies every second.

There are a bunch of facts about the human anatomy, plants, animals, health, disease, microbes, nutrition, etc. Hereby I am recollecting and sharing some of the facts about biology and human anatomy.

  • Our body totally consists of 12 organ systems that work together to ensure the proper functioning of our body. The 12 organ systems include:
  1. The endocrine system is responsible for producing hormones directly into the bloodstream which regulates the growth and development of our body.
  2. The cardiovascular system is involved in transporting blood, oxygen, and nutrients throughout the body.
  3. The immune system is the defense mechanism of our body which acts against invading pathogens.
  4. The digestive system is responsible for converting the food molecules with other basic nutrients into energy which are essential for the body.
  5. The muscular system helps in locomotion, maintaining the posture, and blood circulation all over the body.
  6. The integumentary system acts as a protective barrier from the external environment by preventing the entry of diseases causing pathogens.
  7. The lymphatic system is involved in connecting lymph nodes in our bodies.
  8. The nervous system transmits signals in the body and controls both voluntary and involuntary actions.
  9. The respiratory system is completely involved in respiration process that involves the intake of oxygen and exhales of carbon dioxide.
  10. The reproductive system is mainly involved in the reproduction process.
  11. The skeletal system is a basic framework of our body and it is the combination of all the bones and tissues. This system is also involved in locomotion and providing support and shapes to the body
  12. The excretory system: The specialized system involved in the removal of waste products produced by the body.
  • We are born with 300 bones which are fused 206.
  • We produce 1 to 1.7 liters of saliva in a day.
  • There are around 38 trillion cells in the human body.
  • The stomach gets a new lining for every 3 days to avoid digesting itself.
  • Human teeth are almost hard as rocks and it is the one and the only body part which cannot repair themselves.
  • Respiration is a biochemical process which is carried out by all living organism for their survival. The reaction of respiration is the reverse of photosynthesis. The oxygen which we inhale during respiration is a byproduct of photosynthesis.
  • A human nose functions similar to the air conditioning as it filters the air which we breathe in cools the warm air and vice versa.
  • The only body organ which has no blood supply is the cornea in the eye and it receives oxygen directly from the air.
  • Human Blood is really thicker than water and a single drop of a blood contains 250 millions of blood cells. There are four blood groups : A, B, AB, and O type and it is determined by the presence and absence of antigens and antibodies.
  • The liver is the largest gland in the human body which performs over 500 functions to keep our body healthy.
  • A human brain is filled with 80% of water and it works harder during the night while we are asleep than during the day while we are awake. Thus we burn more calories while sleeping than we are awake.
  • There are ten times more bacteria cells in our body which are harmless. These bacteria are involved in performing the major role in different bodily functions.

Thus, we have seen a few interesting facts about different organs in our body. To know more facts on human biology, check out this YouTube channel-