Important science facts Science facts:
fig: Human circulatory system
1. Is biology a branch of science?
Ans: Yes. Biology is a branch of science where we study living organisms and their processes.
Who doesn’t love fun & amazing facts in science? If you have got a minute, here we have brought you a list of jaw-dropping scientific facts that are hard to believe exist in our everyday life.
Science has a vital role in our lives today. With several valuable innovations like computers, satellites, X-rays, plastic surgery, electricity, the internet, photography, mobile phones, etc, it not only simplified and improved the quality of life that we live today but also enabled us to cope better with illness in the modern era.
Interesting Science Facts That You Probably Didn’t Notice Till Today
If you have grown up treating science as an overwhelming & complex subject in schools, these cool science facts are surely enough to blow your mind.
In school, we’ve learned some awesome science such as Einstein’s theory of relativity, Newton’s law of gravity, the periodic table and DNA replication, etc. This scientific knowledge prepares the foundation for all other amazing things we study further in our academic life. But science is not all about inventions or innovations, it can leave you stunned with amazing facts in our daily life.
7. amazing science facts
1. The Majority of Earth’s Oxygen Is Produced by Oceans
Have you ever thought of where oxygen comes from? Most of us believe that we get oxygen from trees but you might not know that more than half of the earth’s oxygen that we breathe comes from oceans.
Various scientists estimate that 50%-80% of the earth’s oxygen is produced by the oceans. The majority of this production is from plant-based marine organisms. Oceanic plankton, algae, seaweed, and some bacteria can photosynthesize & produce more than half of the world’s oxygen.
2. The Human Stomach Can Dissolve Razor Blades
It may sound horrible, but it is another one of the most amazing facts in science that a human stomach is more capable of dissolving razor blades. Acids are classified on a scale from 0 to 14. Remember, the lower the ph level, the stronger the acid is. And the pH level in the stomach ranges from 1-3 which is so strong that it can dissolve a single-edge blade in a few hours of immersion in the stomach acid, as found in a study. So, if you ever swallow a razor blade, you don’t need to panic.
3. Bananas are Radioactive
The journey of science facts also leads us to one of our favourite fruits, banana but not in a very delicious way!! Have you ever thought that bananas can be an example of a natural radiation source ever while eating them? Probably, you didn’t. But it is true. They contain high levels of potassium, wherein a small amount is radioactive. But it doesn’t require you to quit your yummy banana smoothie as the content of radiation is extremely small.
4. Animals Use Earth’s Magnetic Field to Know Their Location
Yes, among amazing facts in science, sea animals have the ability to sense the magnetic fields of the earth for their orientation. According to the U.S. Geological Study, “There are pieces of evidence showing that some animals, like sea turtles and salmon, can sense the earth’s magnetic fields and use it for navigation.” But is the earth a magnet? Yes. The earth is composed of layers having different chemical compositions and physical properties. The crust of the earth has some magnetization while its core generates its own magnetic field.
5. Helium Works Against Gravity
Till today, did you know that helium doesn’t get affected by gravity? If you cool helium just a few degrees lower than its boiling point ie. 452 degrees Fahrenheit (–269 degrees Celsius), it becomes superfluid, which means it can move without friction. It can rise up and over the sides of a glass. Not only this, but it can also drain through molecule-thin cracks in a container. Among other amazing facts in science, helium is the second-most abundant element in the universe.
6. Humans May Harbour Genes from Other Species
From now on, we can say that we aren’t completely human, at least when it comes to the genetic composition inside our cells. It is another did you know facts that our genome may harbour as many as 145 genes that we inherit from bacteria, other single-celled organisms, and viruses, as per the studies published in the journal Genome Biology.
7. There is No Flavour in Food Without Saliva
Last but not least, one of the most amazing facts in science is that we need saliva to taste our food. In order for food to taste, the chemicals from the food must dissolve in saliva. Once the chemicals in the food are dissolved, they can be detected by receptors in our taste buds.
Did You Know Facts?
Here are a few science facts that will make your day and increase your interest in science. Take a look:
Our planet has more trees compared to stars in the solar system
Water can boil & freeze at the same time
Lights take almost eight minutes to proceed from the sun to earth
Grasshoppers have ears in their bellies
A cockroach has the ability to live for up to one week without its head
Lizards use their tongue to smell
A cloud can as heavy as a million pounds
We can’t burp in space
Men suffer from colour blindness more than women
An individual blood cell takes around one minute to create a complete circuit of the body etc.
Scientific facts on human body
The Human Body
The human body is made up of different types of cells, tissues, organs, and other biological systems, which are involved in carrying out different types of specific functions essential for maintaining a healthy life.
The scientific study of the body’s structures along with its functions are termed as Human anatomy and physiology. Besides these structures and functions, there are numerous amazing facts about our body which we are all not aware of it. Listed below are a few interesting facts about the Human Body.
Fig: Human Body
Circulatory system of human body
carry oxygenated blood to different parts of the body while the ones in the pulmonary loop carry deoxygenated blood to the lungs.
Veins– They carry deoxygenated blood from the body and oxygenated blood from the lungs into the heart.
Capillaries– Arteries break down into a minuscule network of capillaries, which are the smallest blood vessels and present in the lungs and muscles.
Types of Circulatory System
1.Open Circulatory System
In the open circulatory system, blood flows from lacunae, large open spaces and through sinuses among the tissues. Blood comprises very low pressure in this system. They are usually found in higher invertebrates namely insects, prawns, etc. Tissues are in direct contact with the blood. Exchange of nutrients and gasses takes place between the tissue and the blood directly. The flow of blood cannot be stopped as it flows in open space. The respiratory pigment is present in the blood flowing through this system is dissolved in plasma. Red Blood Cells are not present.
2. Closed Circulatory System:
The blood does not come in direct contact with tissue. Blood comprises very high pressure in this system. This circulatory system is found in molluscs, echinoderms and in all vertebrates. The respiratory pigment is present in the blood flowing through this system is found in Red Blood Cells. Closed Circulatory System is more efficient as the volume of blood can be regulated by the contraction and relaxation of the smooth muscles of the blood vessels.
The flow of blood is quite rapid in this system. In the closed circulatory system, blood flows through a closed system of chambers the heart and blood vessels. Nutrients and gasses pass through the capillary wall to the tissue fluid. Lymphatic System comprises a fluid known as lymph, lymph capillaries and lymph ducts. It is an extension of the circulatory system.
Lymphatic Ducts or Vessels: They are present in various parts of the body. They consist of all the three layers namely tunica internal, tunica media and tunica external. These vessels are like veins.
Lymph: All vertebrate possess a lymphatic system. It can be defined as blood minus RBC’s. It is a yellowish fluid present in the lymph vessels.
Lymph capillaries: Small, thin, lined by endothelium resting on a basement membrane. One end unites to form lymphatic ducts and one end is blind
*Introduction to the human heart :
The human heart is one of the most important organs responsible for sustaining life. It is a muscular organ with four chambers. The size of the heart is the size of about a clenched fist.
The human heart functions throughout a person’s lifespan and is one of the most robust and hardest working muscles in the human body.
Besides humans, most other animals also possess a heart that pumps blood throughout their bodies. Even invertebrates such as grasshoppers possess a heart like pumping organ, though they do not function the same way a human heart does.
Position of Heart in Human Body
The human heart is located between the lungs in the thoracic cavity, slightly towards the left of the sternum (breastbone). It is derived from the embryonic mesodermal germ layer.
Fig: Human heart
*The function of the heart:
The function of the heart in any organism is to maintain a constant flow of blood throughout the body. This replenishes oxygen and circulates nutrients among the cells and tissues.
*Following are the main functions of the heart:
1.One of the primary functions of the human heart is to pump blood throughout the body.
2.Blood delivers oxygen, hormones, glucose and other components to various parts of the body, including the human heart.
3.The heart also ensures that adequate blood pressure is maintained in the body.
*Chambers of human heart:
Vertebrate hearts can be classified based on the number of chambers present. For instance, most fish have two chambers, and reptiles and amphibians have three chambers. Avian and mammalian hearts consists of four chambers. Humans are mammals; hence, we have four chambers, namely:
1.Left atrium
2.Right atrium
3.Left ventricle
4.Right ventricle
Artia are thin and have less muscular walls and are smaller than ventricles. These are the blood-receiving chambers that are fed by the large veins.
Ventricles are larger and more muscular chambers responsible for pumping and pushing blood out into circulation. These are connected to larger arteries that deliver blood for circulation.
The right ventricle and right atrium are comparatively smaller than the left chambers. The walls consist of fewer muscles compared to the left portion, and the size difference is based on their functions. The blood originating from the right side flows through the pulmonary circulation, while blood arising from the left chambers is pumped throughout the body.
#Blood vessels:
In organisms with closed circulatory systems, the blood flows within vessels of varying sizes. All vertebrates, including humans, possess this type of circulation. The external structure of the heart has many blood vessels that form a network, with other major vessels emerging from within the structure. The blood vessels typically comprise the following:
Veins supply deoxygenated blood to the heart via inferior and superior vena cava, and it eventually drains into the right atrium.
Capillaries are tiny, tube-like vessels which form a network between the arteries to veins.
Arteries are muscular-walled tubes mainly involved in supplying oxygenated blood away from the heart to all other parts of the body. Aorta is the largest of the arteries and it branches off into various smaller arteries throughout the body.
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