Cells are alive and in order to stay alive and maintain homeostasis the cell needs to move objects into and out of the cell.
Two methods a cell may use are passive transport and active transport.
In the video, I cover diffusion, endocytosis, exocytosis, facilitated diffusion, and pumps. Which are all ways cell transport materials across the membrane.

Learn what a box and whisker plot tells you.

How do we breathe? The lungs and diaphragm work together to bring oxygen into the lungs and to move carbon dioxide out of your lungs.
The diaphragm is a large muscle that is found under your lungs. Your lungs are actually composed of millions of tiny air sacs and depend on the diaphragm in order to inflate
Your rib cage also helps out by having cartilage which allows the rib cage to expand and contract.
When you take a deep breath your diaphragm moves down and a low-pressure area is created and air flows into your nose and mouth. This process is your respiratory system hard at work.
Air enters the nose and mouth and enters the nasal passages.
Your nose and nasal passages have tiny hairs called cilia and mucus that help filter dirt and pollen out of the air.
The air next moves to the pharynx which is located at (the back of the mouth)
From the pharynx, it moves to the larynx which is commonly called the voice box.
the voice box (makes sounds when air
passes over the vocal cords)
Epiglottis: the flap of connective tissue that covers
over the larynx during breathing
It stands open during breathing, allowing air into the larynx. During swallowing, it closes to prevent choking on food

From the larynx, air travels to the Trachea which is a rigid tube made of cartilage.
The trachea leads into two tubes called the left and right bronchus
These tubes continue to branch until you reach a tiny air sac called a alveoli
At the alveoli, oxygen diffuses into the capillaries and carbon dioxide diffuse into the alveoli and is exhaled.
As you exhale the diaphragm moves upward and carbon dioxide and airflows out.

An organ is a group of two or more tissue that works together to complete a common function.
Your body has around 78 organs.
In this video, I will cover several major organs.

The brain is the boss of your body. It runs the show and controls just about everything you do, even when you're asleep

The heart is a very strong muscle made of cardiac muscle that helps pump your blood throughout your body.

The kidneys are very important because they filter your blood and produce urine.

The spleen filters blood and acts like disease detectives. It also produces antibodies and lymphocytes which fight germs.

The Small and Large intestines are a major site of digestion. The small intestine is responsible for 90 percent of digestion. At the same time, the large intestines absorb salts, mineral, and vitamins.

The Liver Is a large organ with over 200 functions. It produces bile which helps with digestion, stores glycogen, and filters your blood to eliminate harmful bacteria and damaged cells.

The gallbladder stores the bile produced by the liver

Your stomach Is a site of digestion of the food we eat. After chewing our food it travels down the esophagus to the stomach.

The pancreas helps to regulate the blood sugar level of your body.

The skin protects us from disease,removes waste, and helps control our temperature.


Finally, the Lungs are responsible for exchanging oxygen for carbon dioxide

How does oxygen enter the body. The respiratory system is designed to exchange oxygen for carbon dioxide. The respiratory system is vital for the production of ATP. The mitochondria uses oxygen in order to produce ATP. In addition, it is designed to get rid of the waster product carbon dioxide.

In this video, I look at 6 physical properties, thermal conductivity, states of matter, density, solubility, ductility, and malleability.
Physical properties can be observed without having to change the object.
0:00 Introduction to Physical properties examples
0:11 Definition physical properties
0:31 Thermal Conductivity
0:40 States of matter
0:52 Density
1:11 Solubility
1:19 Ductility
1:25 Malleability
Each of these properties are examples of physical properties.

Learn what an isotope is in chemistry. Isotopes are two or more types of atoms that have the same atomic number, which represents the number of protons and position in the periodic table but have different mass numbers due to different numbers of neutrons in their nuclei
In order to find the number of neutrons subtract the number of protons from the mass number.

In your middle school science class or in Earth science you will hear about the lithosphere.
The Lithosphere is the top rigid, rocky portion of our earth
There are two types, the continental lithosphere, and the oceanic lithosphere.

The lithosphere is also divided into large tectonic plates.
These plates were one large continent called Pangea that broke apart.

Your metabolism is the sum of all chemical reactions in your body.

Learn the difference between myopia and hyperopia
Myopia which is also called nearsightedness is when you can see items up close clearly and distance objects are blurry.
Hyperopia is the opposite. You can see distant objects clearly and objects that are close are blurry.

Reading a ruler that measures in inches.

Reading a ruler can be a little tricky. What do all of these marks represent?
The ruler is divided into inches which are represented by numbers and then each inch is subdivided into smaller equal units.
In this video, I use a ruler divided into half an inch, one fourth an inch, and one eighth.
With a little practice you will find easy an inch ruler or tape measure can be easy.