20 October 2019
What Makes a Body?Making a Human
What Makes a Body?
The human body is made from the same components as every other living thing. It is the way that they are put together that makes our bodies uniquely human.
The basic materials are simple chemicals such as water, carbon, and oxygen, but they join to create more complex compounds. Trillions of microscopic cells become the building blocks of life, grouping together to form skin, bones, blood, and organs, until the body becomes complete.
Making a Human
Everything in the body is made up of atoms, the tiniest building blocks of matter.
Atoms combine to form molecules.
Millions of molecules form every cell in the body.
There are more than 200 types of cell,
with similar cells working in teams called tissues.
The body's many organs and systems are made up of-
different tissues.
Atoms =>Molecules =>Cell=>Tissue=>Organ=>Body System
Atoms and molecules
The smallest parts in the body are atoms.
These tiny building blocks form the elements in the body, such as carbon.
These tiny building blocks form the elements in the body, such as carbon.
Atoms can also join together in groups called molecules -
for example, water is a molecule, made from a combination of hydrogen and oxygen atoms.
Cell
Molecules build up to create body cells.
There are about 37 trillion cells in the average human, with different types of cells carrying out a variety of body functions, from transporting oxygen to sensing light and colour in the eye.
There are about 37 trillion cells in the average human, with different types of cells carrying out a variety of body functions, from transporting oxygen to sensing light and colour in the eye.
Tissue
Cells performing the same function are grouped together to form body tissues, such as skin, fat, or heart muscle.
Blood is also a tissue, in liquid form.
Organs:
Different kinds of tissue combine to make larger structures called organs.
Each organ works like a machine,performing its own role.
An example of an organ is the stomach, which plays a part in the process of digesting food.
Body system
Organs are at the centre of 12 internal body systems.
Each system has a specific job to keep the body in working order.
The stomach is one of the main organs of the digestive system.
Complete human
When this complex combination of integrated systems, organs, and tissues work together, the human body is complete.
Each individual component plays its part in maintaining a fully functioning body.
1 October 2019
Solar System: Sun and the Eight Planets
Solar System
The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system.
We often call it a solar family, with the sun as its Head.
11 September 2019
Celestial Bodies, Stars,Constellation,Solar System-Astronomy Notes
What are Celestial Bodies?
The sun, the moon and all those objects shining in the night sky are called celestial bodies.
Stars
Some celestial bodies are very big and hot. They are made up of gases. They have their own heat and light, which they emit in large amounts. These celestial bodies are called stars
eg:- Sun
What is called a Constellation?
Constellations are the various patterns formed by different groups of stars.eg:- Ursa Major or Big Bear
Saptarishi:
One of the most easily recognisable constellation is the Saptarishi (Sapta-seven, rishi-sages). It is a group of seven stars that forms a part of Ursa Major Constellation.