The human body as well as that of other animals (Species) is highly structured into organs and tissues which serve specific functions. Tissue is the organizational level intermediate between cells and organs system which compose the whole organism. All the tissues and cell types defined in an animal organism are hierarchical structured and shall be fully described. o

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  • name description synonyms
    abdomen 1: The part of the body between the thorax and the pelvis; also: the cavity of this part of the trunk containing the chief viscera.n2: The posterior section of the body behind the thorax in an arthropod [Brenda].
    abducent nucleus The abducens nucleus is the originating nucleus from which the abducens nerve (VI) emerges - a cranial nerve nucleus. This nucleus is located beneath the fourth ventricle in the caudal portion of the pons, medial to the sulcus limitans [Wikipedia: http://en.wikipedia.org/wiki/Abducens_nucleus].
    accessory cuneate nucleus The accessory cuneate nucleus is located lateral to the cuneate nucleus in the medulla oblongata at the level of the sensory decussation (the crossing fibers of the posterior column/medial lemniscus tract). It receives input from cervical spinal nerves and transmits that information to the cerebellum. These fibers are called cuneocerebellar (cuneate nucleus -> cerebellum) fibers. In this function, the accessory cuneate nucleus is comparable to the upper extremity portion of the posterior spinocerebellar tract [Wikipedia: http://en.wikipedia.org/wiki/Accessory_cuneate_nucleus].
    accessory nucleus The spinal accessory nucleus lies within the cervical spinal cord (C1-C5) in the ventral horn. The nucleus ambiguus is classically said to provide the "cranial component" of the accessory nerve [Wikipedia: http://en.wikipedia.org/wiki/Spinal_accessory_nucleus].
    adipose tissue Connective tissue in which fat is stored and which has the cells distended by droplets of fat [Brenda].
    adrenal cortex The outer portion of the adrenal glands that produces several steroid hormones, including cortisol and aldosterone [Brenda].
    adrenal gland Either of a pair of complex endocrine organs near the anterior medial border of the kidney consisting of a mesodermal cortex that produces glucocorticoid, mineralocorticoid, and androgenic hormones and an ectodermal medulla that produces epinephrine and norepinephrine [Brenda].
    adrenal medulla The inner, reddish-brown portion of the adrenal glands that synthesizes, stores, and releases epinephrine and norepinephrine [Brenda].
    alimentary system The human gastrointestinal tract refers to the stomach and intestine, and sometimes to all the structures from the mouth to the anus. (The "digestive system" is a broader term that includes other structures, including the accessory organs of digestion) [Wikipedia: http://en.wikipedia.org/wiki/Human_gastrointestinal_tract].
    alveolus A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place [Brenda].
    amnion A thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo is suspended [Brenda].
    amniotic fluid Fluid within the amniotic cavity produced by the amnion during the early embryonic period, and later by the lungs and kidneys; at first crystal clear, it later becomes cloudy. It protects the embryo and fetus from injury. The amount at term normally varies from 500 to 1500 mL [Brenda].
    amygdala The one of the four basal ganglia in each cerebral hemisphere that is part of the limbic system and consists of an almond-shaped mass of gray matter in the anterior extremity of the temporal lobe [Brenda].
    amygdaloid nucleus The la (singular: la; also la; Latin, from Greek el, grc-Latn, 'almond', 'tonsil', listed in the Gray's Anatomy as the nucleus amygdalæ) are almond-shaped groups of nuclei located deep within the medial temporal lobes of the brain in complex vertebrates, including humans. Shown in research to perform a primary role in the processing and memory of emotional reactions, the amygdalae are considered part of the limbic system [Wikipedia: http://en.wikipedia.org/wiki/Amygdala].
    anatomical site A defined structural or conceptional component of an organism [Daniel Wuttke].
    anterior dorsal thalamic nucleus The anterior nuclei of thalamus (or anterior nuclear group) are a collection of nuclei at the rostral end of the dorsal thalamus [Wikipedia: http://en.wikipedia.org/wiki/Anterior_nuclei_of_thalamus]. anterior nuclei of thalamus; anterior nuclear group
    anterior lobe of the cerebellum The anterior lobe of cerebellum is the portion of the cerebellum responsible for mediating unconscious proprioception. In alcoholics, it can deteriorate. It is sometimes equated to the "paleocerebellum" [Wikipedia: http://en.wikipedia.org/wiki/Anterior_lobe_of_cerebellum]. paleocerebellum
    anterior medial thalamic nucleus The medial dorsal nucleus (or dorsomedial nucleus of thalamus) is a large nucleus in the thalamus. It is believed to play a role in memory [Wikipedia: http://en.wikipedia.org/wiki/Medial_dorsal_nucleus]. medial dorsal nucleus; dorsomedial nucleus of thalamus
    anterior nucleus The anterior hypothalamic nucleus is a nucleus of the hypothalamus. Its function is thermoregulation (the maintenance of body temperature between certain parameters) of the body. The anterior hypothalamus plays a role in regulating sleep. The anterior hypothalamic region is sometimes grouped with the preoptic area [Wikipedia: http://en.wikipedia.org/wiki/Anterior_hypothalamic_nucleus]. anterior hypothalamic nucleus
    anterior olfactory nucleus A portion of the forebrain of vertebrates. It is found behind the olfactory bulb and in front of the piriform cortex (laterally) and olfactory tubercle (medially) in a region often referred to as the olfactory peduncle or retrobulbar area. The peduncle contains the anterior olfactory nucleus (AON) as well as two other much smaller regions, the tenia tecta (or dorsal hippocampal rudiment) and the dorsal peduncular cortex [Brenda].
    anterior thalamic nuclei The anterior nuclei of thalamus (or anterior nuclear group) are a collection of nuclei at the rostral end of the dorsal thalamus [Wikipedia: http://en.wikipedia.org/wiki/Anterior_nuclei_of_thalamus].
    anterior ventral thalamic nucleus The ventral anterior nucleus is a nucleus of the thalamus. The ventral anterior nucleus receives neuronal inputs from the basal ganglia which includes the substantia nigra and the globus pallidus. It also has inputs from the cerebellum. It sends out neuronal input to the supplementary motor cortex and to primary motor cortex. It helps to function in planning movement. It initiates wanted movement and inhibits unwanted movement [Wikipedia: http://en.wikipedia.org/wiki/Ventral_anterior_nucleus]. ventral anterior nucleus
    anus The posterior opening of the alimentary canal [Brenda].
    aorta The great arterial trunk that carries blood from the heart to be distributed by branch arteries through the body [Brenda].
    appendages In invertebrate biology, an appendage (or outgrowth) is an external body part, or natural prolongation, that protrudes from an organism's body (in verterbrate biology, an example would be a vertebrate's limbs). It is a general term that covers any of the homologous body parts that may extend from a body segment. These include antennae, mouthparts (including mandibles, maxillae and maxillipeds), wings, elytra, gills, walking legs (pereiopods), swimming legs (pleopods), sexual organs (gonopods), and parts of the tail (uropods). Typically, each body segment carries one pair of appendages [Wikipedia: http://en.wikipedia.org/wiki/Appendage].
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