Environmental Science – Water Pollution

Any harmful substance towards water quality and aquatic life is considered a pollutant. They can be diseases, carriers, inorganic chemicals, sediments, radioactive chemicals, heat, or feces. There are multiple ways to measure water quality, especially the water quality index (WQI) that compiles several different measurements. Biological oxygen demand (BOD) is the amount of dissolved oxygen [...]

The Endocrine System

The endocrine system has the major function of secreting animal hormones that are used as chemical signals secreted into the extracellular fluid carried by the circulatory system. Hormones are the functional unit and endocrine glands or ductless glands secrete them. Neuro-secretory cells are nerve cells that secrete hormones into the blood. Hormone system sometimes are [...]

The Circulatory System

The circulatory system has the major function of circulating blood that transports oxygen and nutrients throughout the body. Major organs are the lungs, heart, and blood vessels. The functional unit are the red blood cells. Red Blood Cell Mammals have a closed circulatory system called the cardiovascular system. The heart has one or two atria, [...]

Environmental Science – Astronomy: Tides and Debris

Welcome to the last astronomy post! Gravity between the Earth, moon, and the sun causes tides. The moon's gravity has a strong effect on the oceans than the sun due to how much closer the moon is to the Earth. Daily there are 2 high and 2 low tides. Spring tides are when the Earth, [...]

Environmental Science – Astronomy: Moon and Sun

Welcome back to our next blog post on astronomy! The moon's formation is theorized by two theories. The simultaneous formation theory said that the Earth and the Moon formed at the same time, around 4.6 billion years ago. The impact theory states an object collided with the Earth breaking the Earth apart into the planet [...]

Environmental Science – Astronomy: Stars

Stars are large incandescent bodies. Stars radiate electromagnetic, heat, and light energy which produces their light. Hotter stars glow with shorter wavelength lights making them blue in color. Stars are held together by gravity. Hydrogen combines through fusion reactions producing energy and forming Helium. The lifestyle of a star is as shown below: Stars begin [...]

Environmental Science – Astronomy: The Solar System

Hey guys welcome to the next APES blog post! This is going to a an astronomy sub-series. Our universe contains billions of galaxies, groups of millions of starts held and bound by gravitational forces. Our galaxy is the milky way galaxy. Gravity forms planets and stars by forcing and moving around dust clouds and debris [...]

The Respiratory System

Welcome back to the systems blogs! The respiratory system has the major function of gas exchange, the uptake of oxygen from the environment and the release of carbon dioxide into the environment. Organs imporant in this system are blood vessels, lungs, diaphragm, heart, and the nose. Alveoli are functional units in this system located in [...]