Testosterone Molecular Structure What is Testosterone Testosterone is a hormone produced in the testes (in men) and ovaries (in women). Men produce about thirty times more testosterone than women. Functions: - Determines the physical and behavioral characteristics of men: strengthening of bone structure; voice thickening at puberty; increased muscle mass; hair formation and maintenance (eg beard); maturation of sexual organs, activation of brain areas responsible for sexual desire.
Leatherback Turtle: the largest turtle of all species Summary of Key Information and Features: - The leatherback turtle is a reptile that inhabits deep-sea areas in the oceans. Females approach the coast at the time of spawning, as they lay their eggs on the sea sands. - The scientific name of the leatherback turtle is Dermochelys coriacea.
Avian Influenza Virus: Microscope Image Virus Installation and Proliferation Each type of virus has affinity for a particular part of our body, for example, the polio virus has affinity for the central nervous system, the influenza for the airways, and so on. This “affinity” will be the determining factor of the virus's location and proliferation.
Blood Pressure: Maintaining Blood Flow What It Is (Definition) Blood pressure is the pressure that blood makes on the walls of blood vessels. Characteristics Blood pressure occurs from the contraction of the ventricles. It is larger in the aorta and large systemic arteries. As the distance to the left ventricle increases, the blood pressure decreases.
Respiratory System: Performing Gas Exchange Function The main function of the respiratory system is to perform gas exchange, that is, to bring oxygen (O2) to the cells and to eliminate the carbon dioxide (CO2) produced by them. Characteristics and Functioning of the Respiratory System Most cells in our body use O2 to perform their metabolic functions, this process results in the release of CO2.
Carnivorous animals: meat as the main food What they are Carnivorous animals are those that eat mainly meat from other animals. They are predators because they attack and kill their prey so that they can feed on their flesh. Most carnivorous mammals are terrestrial or arboreal (mainly living in trees).
Jellyfish: example of cnidarian What they are - biological definition Cnidarian animals are relatively simple animals that live in aquatic environments, especially at sea (about 99% live in marine water and 1% in freshwater). There are currently about 10,000 known cnidarian species. Main characteristics of cnidaria: - Epidermis composed of a layer of muscle fibers.
Pancreas (in yellow): produces pancreatic juice What it is Pancreatic juice is a fluid produced by the pancreas and of great importance in the digestion of proteins, carbohydrates, triglycerides and nucleic acids. Main features - Pancreatic juice is clear and colorless. - Consists of basically water, enzymes, minerals and sodium bicarbonate.
Cavities: Organ Protection, Support, and Separation What They Are and Functions Within the human body there are spaces that do more than separate organs. These spaces also have the function of protecting and promoting sustenance. These spaces we call body cavities. Features There are two main cavities.
Muscles: Functions in Moving and Sustaining the Body Introduction The muscles of the human body perform various functions that are of fundamental importance for the proper functioning of our body. It is in the areas of movement and force that they act most. There are several types of muscles in our body, and they perform different tasks.
Hormones: Several Important Functions in the Human Body Introduction There are various chemical elements present in the body of human beings. They are essential for the proper functioning of our body. The absence or deficiency of these elements can lead to improper functioning of the organism, generate disease or even lead the individual to death.
Stomach: Important in Digestion Introduction (what it is) The stomach is an extension of the digestive tract located between the esophagus and the small intestine. Located on the left side of the abdomen, in its walls are the tunics: mucosa, submucosa, muscle and serosa. Knowing the Human Stomach The stomach wall has a structure similar to other parts of the digestive system, with the exception that in this organ there is an extra oblique layer of smooth muscle inside a striated muscle layer, which aids in digestion movements.
Immunology: a science that studies the immune system What it is (definition) Immunology is a science, a branch of biology, which studies the immune system, which is responsible for defending the body of cellular beings against external elements (viruses, bacteria, parasites). , allergic agents, etc.). The main subjects studied by Immunology are: - Functioning of the immune system of beings; - How the immune system reacts to external elements; - Ways to strengthen the immune system (vaccines, medicines, food); - Causes of weakened immune system; - immune system disorders; - Physiological and chemical characteristics of the immune system; - Allergies and the immune system of individuals; - The forms of action of the immune system in combating the invading elements of the body; - immune system defense cells (lymphocytes and phagocytes); - Production, actions and functions of antibodies in the immune system.
Urinary System: Functions of Extreme Importance to the Human Body Introduction The human urinary system is composed of kidneys, ureters, urethra and urinary bladder. It performs functions of utmost importance for the proper functioning of our body. Functions: - Produce, store (in bladder) and eliminate urine; - Eliminate, through the urine, waste that is not used by the body; - Regulate the volume and chemical composition of the blood; - Assist in the production and regulation of red blood cells (red blood cells); - Provide the balance of minerals (sodium, calcium, iron, phosphorus, magnesium, etc.).
Circulatory System: Blood, Heart and Blood Vessels Circulatory System Summary What it is / main components In general, we can say that the circulatory system consists of blood, heart and blood vessels. Main Functions The functions performed by the circulation of blood are indispensable for the balance of our body and vital for maintaining life.
Bibliographic indication for the study of Human Anatomy Bibliography (indication of books on Human Anatomy): - CALAIS-GERMAIN, Blandine. Anatomy for the movement. V. I: Introduction to Body Technique Analysis / Blandine Calais - Germain; . São Paulo: Manole, 1991. - CASTRO, Sebastião Vicente de.
Muscular System: Over 600 Muscles Main Muscles of the Human Body The Human Muscular System has an average of 650 skeletal muscles. We quote below the most important muscles of the human body. HEAD MUSCLES - Occipitofrontal muscle (skull) - Temporoparietal muscle (skull) - Orbicular muscle of eye (eye) - Procerus (nose) - Nasal (nose) - Buccinator muscle (mouth) - Orbicular muscle of mouth (mouth) - Masseter muscle (jaws) - Temporal muscle (jaws) - Stapedial muscle (ear) - Tension tympanic muscle (ear) - Genioglossus muscle (tongue) NECK MUSCLES - Platisma (cervical) - Sternocleidomastoid (cervical) - Long neck muscle (anterior vertebral) ) - Anterior scalene muscle (lateral vertebral) - Lower pharyngeal constrictor muscle (pharynx) - Cricothyroid (larynx) BODY MUSCLES - Spleniums (back) - Spine erector (back) - Intercostal (thorax) - Transverse abdomen - Body lift anus - Anus sphincters Upper limb MUSCLES - Trapezius (spine) - Pectoralis major (thoracic cavity) - Pectoralis minor (thoracic cavity) - Deltoid (shoulder) - Coracobrachialis (upper arm) - Biceps brachii (anterior arm) - Brachialis (anterior arm) - Triceps brachii (posterior arm) - Pronator round (forearm) - Brachioradialis (forearm) - Tenar (hand) - Hypothenar (hand) - Luminaires (hand) LOWER MEMBER - Psoas major muscle (pelvis) - Gluteus maximus, gluteus medius and gluteus minimus (pelvis) - Piriformis muscle (pelvis) - Sartorius muscle (thigh) - Pectinus muscle (thigh) - Biceps thigh muscle (Anterior tibialis muscle) leg) - Long fibular and short fibular muscles (thigh) - Triceps suralis muscle (thigh) - Short extensor muscle of the fingers (foot) - Hallux abductor muscle (foot) - Plantar interosseous muscles (foot) Last reviewed: 30/01 / 2019 _________________________________________ By Elaine Barbosa de Souza Student in Biological Sciences at the Methodist University of São Paulo.
Human lungs: important organs of the respiratory system. Knowing the Lungs of Humans (summary) Lungs are organs that are part of the respiratory system of humans. Each human being has a pair of lungs. Function Gas exchanges between the blood and the environment are performed by the lungs.
Fetus in the maternal uterus Introduction (what it is) The uterus is the largest organ that makes up the female reproductive system of most mammals, including humans. Knowing the Uterus - Main Features and Function There is a passageway for the sperm deposited in the vagina to be able to reach the fallopian tube.