The path of substances from the abiotic environment to the world of living beings and their return to the abiotic world complete what we call the biogeochemical cycle. The term is derived from the fact that there is a cyclic movement of elements that form living organisms (“bio”) and the geological environment (“geo”), where chemical changes intervene.
The library (from the Greek karyon, nucleus and theke, casing, box) is a envelope formed by two lipoprotein membranes whose molecular organization is similar to other cell membranes. Between these two membranes there is a narrow space called the perinuclear cavity. The outer face of the library, in some parts, communicates with the endoplasmic reticulum and often has ribosomes attached to its surface.
We can guess what is in the oven only by the smell we smell in the kitchen air. That is the sense of smell. Particles from food, liquids, flowers, etc. They reach our nose and dissolve in the tissue lining the inner roof of the nasal cavity, the olfactory mucosa.
Gymnosperms (from Greek Gymnos: 'nu'; and sperma: 'seed') are terrestrial plants that live preferably in cold or temperate environments. This group includes plants such as pines, redwoods and cypresses. Gymnosperms have roots, stem and leaves. They also have reproductive branches with modified leaves called strobiles.
Extremely variable in shape, a complete leaf is formed by a "head", the petiole, and a flat surface with two faces, the limb traversed by ribs. The main function of the leaf is to serve as the site where photosynthesis is performed. In some plants there are modified leaves that perform specialized functions, such as insect trapping leaves of insectivorous plants and cactus thorns.
The human species, like other vertebrates, has several endocrine glands, some of which are responsible for producing more than one type of hormone. The pituitary or pituitary gland has long been considered the master gland of the endocrine system for controlling the activity of other organs, whether glandular or not.
