Human organ systems and their functions
By: Sandra Piddock
It may come as a surprise to discover that there are eleven organ systems in the human body, as most people think of organs as the liver, heart, lungs, kindneys and possibly the skin. However, the human organ system is much more complex than that...
The three main types of muscles
By: Jose Juan Gutierrez
There are three main types of muscles in the human body. They´re strong elastic tissues that contract to allow different parts of the body to perform movement, such as jumping, walking, breathing, digesting food, blinking, etc. Most of muscle contractions occur without any conscious...
The three main types of muscles
By: William Draper
Muscle cells contain long strands of the proteins actin and myosin. Nerve impulses sent to the cells cause a chemical response which suddenly and dramatically shortens the fibers, changing the cell shape and and creating a contraction in the muscle. The body contains three distinct...
The function of the thalamus
By: Viven Yeo
The thalamus is located in the diencephalon, which consists of the epithalamus, the thalamus, the subthalamus and the hypothalamus. The diencephalon is situated between the cerebral hemispheres and the brain stem. The thalamus is the largest part of the diencephalon. The thalamus has multiple functions...
The function of the thalamus
By: Catherine Loeffler
The Human Thalamus: A Data-Gatherer and Information Relay Station Second to None The term relay; it can refer to a baton-transferring race, or a transmitting beacon. It can also refer to any one of a number of ways in which information proceeds from point A...
Anatomy: Structure of the vocal cords
By: Lynn Robling
Vocal cords or folds are located in the throat of humans. Specifically they are in the larynx near the trachea. Vocal cords are actually folds of mucus membranes or tissue that stretch and vibrate to help produce sounds. These vocal folds are primarily muscle tissue...
Anatomy: Structure of the vocal cords
By: Matthew Adams - 614107
The vocal cords, or vocal folds, are dual folding membranes. These folds are stretched horizontally over the larynx in order to create the vibrations required to make sound. These folds are controlled by the vagus nerve and are located at the top of the trachea...
Pinealocytes and their function
By: Allienne Becker
Pinealocytes are the primary cells of the pineal gland. Their function is to produce melatonin, a hormone that has very beneficial effects on the human body. Long regarded as a mystery gland and connected it to myths, superstition, and even metaphysical concepts, the philosopher Descartes...
Pinealocytes and their function
By: Blaise Pascal
The pineal gland is part of the endocrine system and like the other endocrine glands; it is responsible for releasing hormones in the body. Similar to the other organs in the body, the pineal gland has specialized cells. The primary cells of the pineal gland...
The three types of human hair
By: Viven Yeo
Three types of hair Hair is a keratinized filament produced from hair follicles in the skin. Three different types of hair can be found in humans: lanugo hair, vellus hair and terminal hair. Lanugo hair Lanugo hair is fine, long silky hair that is found...

 

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