Blood is a specialized bodily fluid that delivers necessary substances to the body's cells — such as nutrients and oxygen — and transports waste products away from those same cells. (sangre)

veins (from the Latin vena) are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood. (venas)

nerve: is an enclosed, cable-like bundle of peripheral axons (the long, slender projections of neurons). A nerve provides a common pathway for the electrochemical nerve impulses that are transmitted along each of the axons. (nervios)

joint is the location at which two or more bones make contact. They are constructed to allow movement and provide mechanical support, and are classified structurally and functionally. (articulaciones)

Cartilage is a type of dense connective tissue. It is composed of specialized cells called chondrocytes that produce a large amount of extracellular matrix composed of collagen fibers, abundant ground substance rich in proteoglycan, and elastin fibers. (cartilagos)

hospital is an institution for health care providing patient treatment by specialized staff and equipment, and often but not always providing for longer-term patient stays. (hospital)

emergency is a situation which poses an immediate risk to health, life, property or environment. Most emergencies require urgent intervention to prevent a worsening of the situation, although in some situations, mitigation may not be possible and agencies may only be able to offer palliative care for the aftermath. (emergencia)

Ambulance is a vehicle for transporting sick or injured people, to, from or between places of treatment for an illness or injury. The term ambulance is used to describe a vehicle used to bring medical care to patients outside of the hospital or to transport the patient to hospital for follow-up care and further testing. (ambulancia)

heart is a muscular organ in all vertebrates responsible for pumping blood through the bloo vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart." (corazon)

Skeleton In biology, a skeleton is a rigid framework that provides protection and structure in many types of animal, particularly those of the phylum Chordata and of the superphylum Ecdysozoa. (esqueleto)

Bones are rigid organs that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals. Bone tissue is a type of dense connective tissue. (Hueso)

neuron is the basic unit of information processing and the building block of the brain. Working together with other neurons and cells throughout the body, it allows us to think, feel, move and breathe. (neurona)

kidneys are paired organs seen in many types of animals, including vertebrates and some invertebrates. Part of the urinary system, they are responsible for urine production as well as a number of other homeostatic functions. These include regulation of electrolytes, acid-base balance, and blood pressure. (riñon)

liver is a vital organ present in vertebrates and some other animals; it has a wide range of functions, a few of which are detoxification, protein synthesis, and production of biochemicals necessary for digestion. The liver is necessary for survival; there is currently no way to compensate for the absence of liver function. (Higado)

lung is the essential respiration organ in air-breathing animals, including most tetrapods, a few fish and a few snails. In mammals and the more complex life forms, the two lungs are located in the chest on either side of the heart. Their principal function is to transport oxygen from the atmosphere into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere. (Pulmones)

urinary bladder (roughly translated from vesicle) is a solid, muscular, and distensible (or elastic) organ that sits on the pelvic floor in mammals. It is the organ that collects urine excreted by the kidneys prior to disposal by urination. (Vejiga Urinaria)

Thoracic diaphragm is a sheet of muscle extending across the bottom of the rib cage. The diaphragm separates the thoracic cavity from the abdominal cavity and performs an important function in respiration. (Diafragma Toracico)

stomach is a hollow, muscular organ of the gastrointestinal tract (digestive system), between the throat and the small intestine. It is involved in the second phase of digestion, following mastication (chewing). (Estomago)

esophagus sometimes known as the gullet, is an organ in vertebrates which consists of a muscular tube through which food passes from the pharynx to the stomach. (Esofago)

Trachea is a common term for an airway through which respiratory air passes in organisms. In vertebrates, it is held open by up to 20 C-shaped rings of cartilage, and may also be known as the "windpipe." (Traquea)

vitamin is an organic compound required as a nutrient in tiny amounts by an organism. A compound is called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from the diet. (Vitamina)

Proteins (also known as polypeptides) are organic compounds made of aminoacids arranged in a linear chain polymer and joined together by peptide bonds between the carboxyl and amino groups of adjacent amino acid residues. (Proteinas)

Carbohydrates or saccharides are the most abundant of the four major classes of biomolecules. They fill numerous roles in living things, such as the storage and transport of energy (eg: starch, glycogen) and structural components (eg: cellulose in plants and chitin). Additionally, carbohydrates and their derivatives play major roles in the working process of the immune system, fertilization, pathogenesis, blood clotting, and development. (Carbohidratos)

skin is the outer covering of the body. It is the largest organ of the integumentary system made up of multiple layers of epithelial tissues, and guards the underlying muscles, bones, ligaments and internal organs. (Piel)