| larynx | The modified upper part of the trachea of air-breathing vertebrates that in humans, most other mammals, and a few lower forms contains the vocal cords [Brenda]. | — |
| leukocyte | Any of the blood cells that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils [Brenda]. | — |
| liver and biliary system | The biliary system consists of the organs and ducts (bile ducts, gallbladder, and associated structures) that are involved in the production and transportation of bile [MedicalCenter: http://medicalcenter.osu.edu/patientcare/healthcare_services/liver_biliary_pancreatic_disease/biliary_system_anatomy/Pages/index.aspx]. | — |
| lower limb | The lower limb is a limb of the body [Wikipedia: http://en.wikipedia.org/wiki/Lower_limb]. According to Terminologia Anatomica, it includes the pelvic girdle, buttocks, hip, and thigh, as well as the components distal to the knee [Wikipedia: http://en.wikipedia.org/wiki/Lower_limb]. | — |
| lung | One of the usually paired compound saccular thoracic organs that constitute the basic respiratory organ of air-breathing vertebrates [Brenda]. | — |
| lymph | A clear, watery, sometimes faintly yellowish fluid derived from body tissues that contains white blood cells and circulates throughout the lymphatic system, returning to the venous bloodstream through the thoracic duct. Lymph acts to remove bacteria and certain proteins from the tissues, transport fat from the small intestine, and supply mature lymphocytes to the blood [Brenda]. | — |
| lymph node | Any of the rounded masses of lymphoid tissue that are surrounded by a capsule of connective tissue, are distributed along the lymphatic vessels, and contain numerous lymphocytes which filter the flow of lymph [Brenda]. | — |
| lymphocytes | A lymphocyte is a type of white blood cell in the vertebrate immune system [Wikipedia: http://en.wikipedia.org/wiki/Lymphocyte]. | — |
| macrophage | Relatively long-lived phagocytic cell of mammalian tissues, derived from blood monocyte. Macrophages from different sites have distinctly different properties. Main types are peritoneal and alveolar macrophages, tissue macrophages (histiocytes), Kuppfer cells of the liver, and osteoclasts. In response to foreign materials may become stimulated or activated. Macrophages play an important role in killing of some bacteria, protozoa, and tumour cells, release substances that stimulate other cells of the immune system, and are involved in antigen presentation. May further differentiate within chronic inflammatory lesions to epithelioid cells or may fuse to form foreign body giant cells or Langhans' giant cells [Brenda]. | — |
| memory B cell | Memory B cells are a B cell sub-type that are formed following primary infection [Wikipedia: http://en.wikipedia.org/wiki/Memory_B_cell]. | — |
| mesentery | One or more vertebrate membranes that consist of a double fold of the peritoneum and invest the intestines and their appendages and connect them with the dorsal wall of the abdominal cavity [Brenda]. | — |
| mucosa | A membrane lining all body passages that communicate with the air, such as the respiratory and alimentary tracts, and having cells and associated glands that secrete mucus [Brenda]. | — |
| muscle | A body tissue consisting of long cells that contract when stimulated and produce motion [Brenda]. | — |
| naive T cell | A naive T cell or Th0 cell is a T cell that has differentiated in bone marrow, and successfully undergone the positive and negative processes of central selection in the thymus. A naive T cell is considered mature and unlike activated T cells or memory T cells it has not encountered its cognate antigen within the periphery [Wikipedia: http://en.wikipedia.org/wiki/Naive_T_cell]. | — |
| natural killer cell | A large granular lymphocyte capable of killing a tumor or microbial cell without prior exposure to the target cell and without having it presented with or marked by a histocompatibility antigen [Brenda]. | — |
| neutrophil | A granulocyte that is the chief phagocytic white blood cell of the blood [Brenda]. | — |
| nose | 1a: The part of the face that bears the nostrils and covers the anterior part of the nasal cavity; broadly: this part together with the nasal cavity.n1b: The anterior part of the head at the top or end of the muzzle: snout, proboscis.n2: The vertebrate olfactory organ [Brenda]. | — |
| oesophagus | The esophagus (oesophagus) is an organ in vertebrates which consists of a muscular tube through which food passes from the pharynx to the stomach. During swallowing, food passes from the mouth through the pharynx into the esophagus and travels via peristalsis to the stomach. The word esophagus is derived from the Latin Åsophagus, which derives from the Greek word oisophagos, lit. "entrance for eating." In humans the esophagus is continuous with the laryngeal part of the pharynx at the level of the C6 vertebra. The esophagus passes through posterior mediastinum in thorax and enters abdomen through a hole in the diaphragm at the level of the tenth thoracic vertebrae (T10). It is usually about 25â30 cm long depending on individual height. It is divided into cervical, thoracic and abdominal parts. Due to the inferior pharyngeal constrictor muscle, the entry to the esophagus opens only when swallowing or vomiting [Wikipedia: http://en.wikipedia.org/wiki/Esophagus]. | — |
| omentum | A sheet of fat that is covered by peritoneum. The greater omentum is attached to the bottom edge of the stomach, and hangs down in front of the intestines. Its other edge is attached to the transverse colon. The lesser omentum is attached to the top edge of the stomach, and extends to the undersurface of the liver [Omentum: http://www.medterms.com/script/main/art.asp?articlekey=4632]. | — |
| oral cavity | The mouth is the first portion of the alimentary canal that receives food and [Wikipedia: http://en.wikipedia.org/wiki/Mouth]. | — |
| pancreas | A large lobulated gland of vertebrates that secretes digestive enzymes and the hormones insulin and glucagon [Brenda]. | — |
| parathyroid | The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone. Humans usually have four parathyroid glands, which are usually located on the rear surface of the thyroid gland, or, in rare cases, within the thyroid gland itself or in the chest. Parathyroid glands control the amount of calcium in the blood and within the bones [Wikipedia: http://en.wikipedia.org/wiki/Parathyroid_gland]. | — |
| pelvis | The inferior portion of the trunk of the body, bounded anteriorly and laterally by the two hip bones and posteriorly by the sacrum and coccyx. The pelvis is divided by a plane passing through the terminal lines into the pelvis major superiorly and the pelvis minor inferiorly [Brenda]. | — |
| perineum | In human anatomy, the perineum (Late Latin, from Greek ÏεÏÎ¯Î½ÎµÎ¿Ï - perineos) is a region of the body including the perineal body and surrounding structures. There is some variability in how the boundaries are defined, but the term generally includes the genitals and anus [Wikipedia: http://en.wikipedia.org/wiki/Perineum]. | — |
| peripheral nervous system | The peripheral nervous system (PNS) connects the central nervous system (CNS) to sensory organs (such as the eye and ear), other organs of the body, muscles, blood vessels and glands [Brenda]. | — |
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