The Importance of Air

The air is a key element being formed by a combination of gases, water vapor and particulate matter. It is, therefore, a vital substance for the maintenance of life on earth, alongside water and soil. In addition, air is essential for the climate, Read more

Anabolism and Catabolism

Metabolism is the set of all biochemical reactions that occur in the body, divided into two forms: anabolism and catabolism. The regulation of metabolism varies according to the characteristics of each individual, such as: weight, age, sex and physical activities. Read more


The pharynx is an organ that is part of both the respiratory system and the digestive system. It is a membranous muscular channel, which communicates with the nose and mouth, connecting them to the larynx and esophagus. Anatomy of the Pharynx Read more

Types of stem

The stem is the part of the plant with the function of supporting and guiding substances. Stems can have a variety of shapes. For this reason, they are classified as aerial, underground and aquatic. Aerial stems Aerial stems can be of Read more

Electronic Waste

The electronic waste (e-waste) or technological , as its name indicates, is that from electronic materials. It is also known by the acronym RAEE (Waste Electrical and Electronic Devices). With the advancement of technology in the modern world, there is an excess of Read more


The lion is a large, feline, vertebrate and carnivorous mammal animal. Its scientific name is Panthera leo. Known as the King of the Jungle, the lion can be found in Asia, Africa and Europe. It is currently classified as vulnerable to extinction Read more


Neurotransmitters are chemical compounds secreted by the cells of the nervous system, neurons, responsible for transmitting the necessary information to different parts of the body. Because they are communicated by synapses, these chemical mediators are usually found in presynaptic vesicles. Read more


The ligaments are resistant structures, however, somewhat elastic, formed by fibrous connective whitish tissue (presence of collagen), which have the function to join two or more bone stabilizing and protecting the joints of the body so as to prevent displacement of bone thus acting Read more


The recycling is a way to reuse the raw materials that are discarded. In this sense, recycling means reducing the amount of waste from products consumed by man. The term “Recycling” comes from the English language in which ” re ” means to repeat and ” cycle ” corresponds Read more


The bryophytes are small avascular plants that generally live in moist environments, forming “green carpets” on rocks and tree trunks or in the ravines. The mosses and liver (see following figures: liver in detail above and forming a moss) are the most known plants this group, as well as Read more