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: 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 [...]

The Immune System

The immune system has the major function of defending the body from invaders such as pathogenic bacteria and viruses which can lead to diseases, sicknesses, and death. The functional unit of this system are white blood cells called lymphocytes and antibodies that have the ability to attach to microbes and mark them for death and [...]

The Reproductive System

Welcome back, today's topic is the reproductive system. This has the major function of reproducing offspring of a species to continue its survival. Major organs include the vagina, penis, ovary, and testes, with functional units such as eggs and sperm produces by meiosis. The female human goes through a menstrual cycle where ovulation occurs at [...]

The Nervous System

Welcome back to our systems talks! Today will be about nervous system. The nervous system is tasked with controlling all our movements, thoughts, and processes. Major organs include the brain, spinal cord, nerves, and blood vessels, and neurons, or nerve cells which are their functional units. Neurons are organized into nerve nets, and in complex [...]

The Excretory System

Welcome back to our systems blogs! Take a quick trip to the bathroom before reading this one, its going to be long! The excretory system has the major function of excretion, which is the loss of nitrogen containing waste and byproducts of metabolic processes in the animal body. Major organs involved in this system include [...]